Abbasid-Carolingian alliance
Encyclopedia
An Abbasid–Carolingian alliance was attempted and partially formed during the 8th to 9th century through a series of embassies, rapprochements and combined military operations between the Frankish
Franks
The Franks were a confederation of Germanic tribes first attested in the third century AD as living north and east of the Lower Rhine River. From the third to fifth centuries some Franks raided Roman territory while other Franks joined the Roman troops in Gaul. Only the Salian Franks formed a...

 Carolingian Empire
Carolingian Empire
Carolingian Empire is a historiographical term which has been used to refer to the realm of the Franks under the Carolingian dynasty in the Early Middle Ages. This dynasty is seen as the founders of France and Germany, and its beginning date is based on the crowning of Charlemagne, or Charles the...

 and the Abbasid Caliphate or the pro-Abbasid Muslim
Muslim
A Muslim, also spelled Moslem, is an adherent of Islam, a monotheistic, Abrahamic religion based on the Quran, which Muslims consider the verbatim word of God as revealed to prophet Muhammad. "Muslim" is the Arabic term for "submitter" .Muslims believe that God is one and incomparable...

 rulers in Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

. These contacts followed the intense conflict between the Carolingians and the Umayyads, marked by the landslide Battle of Tours
Battle of Tours
The Battle of Tours , also called the Battle of Poitiers and in Battle of the Court of the Martyrs, was fought in an area between the cities of Poitiers and Tours, located in north-central France, near the village of Moussais-la-Bataille, about northeast of Poitiers...

 in 732, and were aimed at establishing a counter-alliance with the faraway Abbasid Empire. Slightly later, another Carolingian-Abbasid alliance was attempted in a conflict against the Byzantine Empire
Byzantine Empire
The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

.

Background

The Islamic invasion of Gaul
Islamic invasion of Gaul
The Islamic invasion of Gaul followed the invasion of Spain by the Muslim Commander Tariq ibn Ziyad in 711. During the 8th century Arab and Berber armies invaded Southern France, as far as Poitiers and the Rhône valley as far as Avignon, Lyon, Autun, until the turning point of the Battle of Tours...

 from 719 to 759 was a period of intense conflict between the Carolingians and the Umayyads, marked by the landslide Battle of Tours
Battle of Tours
The Battle of Tours , also called the Battle of Poitiers and in Battle of the Court of the Martyrs, was fought in an area between the cities of Poitiers and Tours, located in north-central France, near the village of Moussais-la-Bataille, about northeast of Poitiers...

 in 732. Islamic forces were finally expelled from Gaul with the recovery of Narbonne
Narbonne
Narbonne is a commune in southern France in the Languedoc-Roussillon region. It lies from Paris in the Aude department, of which it is a sub-prefecture. Once a prosperous port, it is now located about from the shores of the Mediterranean Sea...

 in 759 by Pepin the Short, but the Umayyad presence in Spain continued to represent a strong threat to the Carolingians.

Embassies

Contacts between the Carolingians and the Abbasids started soon after the establishment of the Abbasid Caliphate and the concommital fall of the Umayyad Caliphate in 751. The Carolingian ruler Pepin the Short had a powerful enough position in Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 to "make his alliance valuable to the Abbasid caliph
Caliph
The Caliph is the head of state in a Caliphate, and the title for the ruler of the Islamic Ummah, an Islamic community ruled by the Shari'ah. It is a transcribed version of the Arabic word   which means "successor" or "representative"...

 of Baghdad
Baghdad
Baghdad is the capital of Iraq, as well as the coterminous Baghdad Governorate. The population of Baghdad in 2011 is approximately 7,216,040...

, al-Mansur
Al-Mansur
Al-Mansur, Almanzor or Abu Ja'far Abdallah ibn Muhammad al-Mansur was the second Abbasid Caliph from 136 AH to 158 AH .-Biography:...

". Former supporters of the Umayyad Caliphate were established firmly in southern Spain under Abd ar-Rahman I
Abd ar-Rahman I
Abd al-Rahman I, or, his full name by patronymic record, Abd al-Rahman ibn Mu'awiya ibn Hisham ibn Abd al-Malik ibn Marwan was the founder of the Umayyad Emirate of Córdoba , a Muslim dynasty that ruled the greater part of Iberia for nearly three centuries...

, and constituted a strategic threat both to the Carolingian on their southern border, and to the Abbasid at the western end of their dominion.

Embassies were exchanged both ways, with the apparent objective of cooperating against the Umayyads of Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

: a Frank embassy went to Baghdad
Baghdad
Baghdad is the capital of Iraq, as well as the coterminous Baghdad Governorate. The population of Baghdad in 2011 is approximately 7,216,040...

 in 765 which returned to Europe after three years with numerous presents, and an Abbasid embassy from Al-Mansur
Al-Mansur
Al-Mansur, Almanzor or Abu Ja'far Abdallah ibn Muhammad al-Mansur was the second Abbasid Caliph from 136 AH to 158 AH .-Biography:...

 visited France in 768.

Commercial exchanges

Commercial exchanges occurred between the Carolingian and Abassid realms, and Arabic coins are known to have spread in Carolingian Europe in that period. Arab gold is reported to have circulated in Europe during the 9th century, apparently in payment of the export of slaves, timber
Timber
Timber may refer to:* Timber, a term common in the United Kingdom and Australia for wood materials * Timber, Oregon, an unincorporated community in the U.S...

, iron
Iron
Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust...

 and weapons from Europe to Eastern lands. As a famous example, the 8th century English king Offa of Mercia
Offa of Mercia
Offa was the King of Mercia from 757 until his death in July 796. The son of Thingfrith and a descendant of Eowa, Offa came to the throne after a period of civil war following the assassination of Æthelbald after defeating the other claimant Beornred. In the early years of Offa's reign it is likely...

 is known to have minted copies of Abbasid dinars struck in 774 by Caliph Al-Mansur
Al-Mansur
Al-Mansur, Almanzor or Abu Ja'far Abdallah ibn Muhammad al-Mansur was the second Abbasid Caliph from 136 AH to 158 AH .-Biography:...

 with "Offa Rex" centered on the reverse amid inscriptions in Pseudo-Kufic
Pseudo-Kufic
Pseudo-Kufic, or Kufesque, also sometimes Pseudo-Arabic, refers to imitations of the Arabic Kufic script, or sometimes Arabic cursive script, made in a non-Arabic context, during the Middle-Ages or the Renaissance: "Imitations of Arabic in European art are often described as pseudo-Kufic, borrowing...

 script.

Military alliance in Spain (777-778)

In 777, pro-Abbasid rulers of northern Spain contacted the Carolingian to request help against the powerful Ummayyad Caliphate in southern Spain, still led by Abd ar-Rahman I
Abd ar-Rahman I
Abd al-Rahman I, or, his full name by patronymic record, Abd al-Rahman ibn Mu'awiya ibn Hisham ibn Abd al-Malik ibn Marwan was the founder of the Umayyad Emirate of Córdoba , a Muslim dynasty that ruled the greater part of Iberia for nearly three centuries...

. The "Spanish Abbasids sought support for their cause in Pepin's Francia; he was content to oblige because the Cordoban dynasty posed a constant military threat to southwestern France".

Sulayman al-Arabi
Sulayman al-Arabi
Sulayman ibn Yaqzan al-Arabi was Wali of Barcelona and Girona in the year 777.For the history of al-Arabi, we must rely on the Muslim historian Abu al-Hassan Ali ibn Muhammad ibn Muhammad , also known as Ali ‘izz ad-Din ibn al-Athir al-Jazari, who wrote four centuries after the fact.According to...

 the pro-Abbasid Wali
Wali
Walī , is an Arabic word meaning "custodian", "protector", "sponsor", or authority as denoted by its definition "crown". "Wali" is someone who has "Walayah" over somebody else. For example, in Fiqh the father is wali of his children. In Islam, the phrase ولي الله walīyu 'llāh...

 (governor) of Barcelona
Barcelona
Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...

 and Girona
Girona
Girona is a city in the northeast of Catalonia, Spain at the confluence of the rivers Ter, Onyar, Galligants and Güell, with an official population of 96,236 in January 2009. It is the capital of the province of the same name and of the comarca of the Gironès...

 sent a delegation to Charlemagne
Charlemagne
Charlemagne was King of the Franks from 768 and Emperor of the Romans from 800 to his death in 814. He expanded the Frankish kingdom into an empire that incorporated much of Western and Central Europe. During his reign, he conquered Italy and was crowned by Pope Leo III on 25 December 800...

 in Paderborn
Paderborn
Paderborn is a city in North Rhine-Westphalia, Germany, capital of the Paderborn district. The name of the city derives from the river Pader, which originates in more than 200 springs near Paderborn Cathedral, where St. Liborius is buried.-History:...

, offering his submission, together with the allegiance of Husayn of Zaragoza
Husayn of Zaragoza
Husayn of Zaragoza , Wali of Zaragoza, which is now the Spanish province of Aragón, from 774 to 781.-Events during the rule of Husayn:...

 and Abu Taur of Huesca
Abu Taur of Huesca
Abu Taur was the Wali of Huesca in 777, who joined Sulayman al-Arabi in offer his submission to Charlemagne and collaborated with Frankish forces in the unsuccessful assault on Zaragoza in 778. It has been suggested that he may be identical to Abu Tawr ibn Qasi, son of the eponymous ancestor of...

 in return for military aid. The three pro-Abbasid rulers also conveyed that the caliph of Baghdad, Muhammad al-Mahdi
Al-Mahdi
Muhammad ibn Mansur al-Mahdi , was the third Abbasid Caliph who reigned from 158 AH to 169 AH . He succeeded his father, al-Mansur....

, was preparing an invasion force against the Umayyad ruler Abd al-Rhaman I.

Following the sealing of this alliance at Paderborn, Charlemagne marched across the Pyrenees
Pyrenees
The Pyrenees is a range of mountains in southwest Europe that forms a natural border between France and Spain...

 in 778 "at the head of all the forces he could muster". His troops were welcomed in Barcelona
Barcelona
Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...

 and Girona
Girona
Girona is a city in the northeast of Catalonia, Spain at the confluence of the rivers Ter, Onyar, Galligants and Güell, with an official population of 96,236 in January 2009. It is the capital of the province of the same name and of the comarca of the Gironès...

 by Sulayman al-Arabi. As he moved towards Zaragoza
Zaragoza
Zaragoza , also called Saragossa in English, is the capital city of the Zaragoza Province and of the autonomous community of Aragon, Spain...

, the troops of Charlemagne were joined by troops led by Sulayman. Husayn of Zaragoza, however, refused to surrender the city, claiming that he had never promised Charlemagne his allegiance. Meanwhile, the force sent by the Baghdad caliphate seems to have been stopped near Barcelona
Barcelona
Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...

. After a month of siege at Zaragoza, Charlemagne decided to return to his kingdom. On his retreat, Charlemagne suffered an attack from the Basques
Basque people
The Basques as an ethnic group, primarily inhabit an area traditionally known as the Basque Country , a region that is located around the western end of the Pyrenees on the coast of the Bay of Biscay and straddles parts of north-central Spain and south-western France.The Basques are known in the...

 in central Navarra
Navarre
Navarre , officially the Chartered Community of Navarre is an autonomous community in northern Spain, bordering the Basque Country, La Rioja, and Aragon in Spain and Aquitaine in France...

. As a reprisal he attacked Pamplona
Pamplona
Pamplona is the historial capital city of Navarre, in Spain, and of the former kingdom of Navarre.The city is famous worldwide for the San Fermín festival, from July 6 to 14, in which the running of the bulls is one of the main attractions...

, destroying it. However on his retreat north his baggage train was ambushed by the Basques at the Battle of Roncevaux Pass
Battle of Roncevaux Pass
The Battle of Roncevaux Pass was a battle in 778 in which Roland, prefect of the Breton March and commander of the rear guard of Charlemagne's army, was defeated by the Basques...

 August 15, 778.

Carolingian presence remained south of the Pyrenees
Pyrenees
The Pyrenees is a range of mountains in southwest Europe that forms a natural border between France and Spain...

 however, and the city of Girona
Girona
Girona is a city in the northeast of Catalonia, Spain at the confluence of the rivers Ter, Onyar, Galligants and Güell, with an official population of 96,236 in January 2009. It is the capital of the province of the same name and of the comarca of the Gironès...

 was captured in 785, and they then concentrated on expanding their rule to Vich
Vich
-Places:*Vich, Switzerland*Vigo di Fassa, Italy*Old form of Vic, Catalonia, Spain-People:*A patronymic suffix in names in Russian Empire, Soviet Union and CIS countries...

, Caserras and Cardona
Cardona
Cardona is a town ìn Catalonia, Spain, in the province of Barcelona; about 90 km northwest of the city of Barcelona, on a hill almost surrounded by the river Cardoner, a branch of the Llobregat.Near the town is an extensive deposit of rock salt...

.

The Muslims made their last incursion in Gaul in 793, where they sacked the suburbs of Narbonne
Narbonne
Narbonne is a commune in southern France in the Languedoc-Roussillon region. It lies from Paris in the Aude department, of which it is a sub-prefecture. Once a prosperous port, it is now located about from the shores of the Mediterranean Sea...

, and defeated William of Gellone, count of Toulouse
William of Gellone
Saint William of Gellone was the second Count of Toulouse from 790 until his replacement in 811. His Occitan name is Guilhem, and he is known in French as Guillaume d'Orange, Guillaume Fierabrace, and the Marquis au court nez.He is the hero of the Chanson de Guillaume, an early chanson de geste,...

 near Carcassonne
Carcassonne
Carcassonne is a fortified French town in the Aude department, of which it is the prefecture, in the former province of Languedoc.It is divided into the fortified Cité de Carcassonne and the more expansive lower city, the ville basse. Carcassone was founded by the Visigoths in the fifth century,...

.

Later contacts

After these campaigns, there were again numerous embassies between Charlemagne
Charlemagne
Charlemagne was King of the Franks from 768 and Emperor of the Romans from 800 to his death in 814. He expanded the Frankish kingdom into an empire that incorporated much of Western and Central Europe. During his reign, he conquered Italy and was crowned by Pope Leo III on 25 December 800...

 and the Abbasid caliph Harun al-Rashid
Harun al-Rashid
Hārūn al-Rashīd was the fifth Arab Abbasid Caliph in Iraq. He was born in Rey, Iran, close to modern Tehran. His birth date remains a point of discussion, though, as various sources give the dates from 763 to 766)....

 from 797, apparently in view of a Carolingian-Abbasid alliance against Byzantium
Byzantium
Byzantium was an ancient Greek city, founded by Greek colonists from Megara in 667 BC and named after their king Byzas . The name Byzantium is a Latinization of the original name Byzantion...

, or with a view to gaining an alliance against the Umayyads of Spain.

Strategic interest

Indeed, "Charles's conflict with the Umayyad Emir of Cordova made him an ally of the Abbasid emir of Baghdad, the celebrated Harun al-Rashid", and they were "forming a pact against a common enemy - namely the Muslim rulers in Umayyad Spain".

For Charlemagne, the alliance may also have functioned as a counterweight against the Byzantine Empire
Byzantine Empire
The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

, which was opposed to his role in Italy and his claim to the title of Roman Emperor. For Harun al-Rashid, there was an advantage in having a partner against his rivals in Umayyad Spain.

Embassies

Three embassies were sent by Charlemagne to Harun al-Rashid's court and the latter sent at least two embassies to the Charlemagne. Harun al-Rashid is reported to have sent numerous presents to Charlemagne, such as aromatics, fabrics, a clock
Clock
A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece...

, a chessboard
Chessboard
A chessboard is the type of checkerboard used in the board game chess, and consists of 64 squares arranged in two alternating colors...

, and an elephant named Abu 'Abbas
Abul-Abbas
Abul-Abbas, also Abul Abaz or Abulabaz, was an Asian elephant given to Emperor Charlemagne by the caliph of Baghdad, Harun al-Rashid, in 797. The elephant's name and events from his life in the Carolingian Empire are recorded in the annales regni francorum , and Einhard's vita Karoli Magni also...

. The automatic clock was a water-clock made of brass, described in the 807 Royal Frankish Annals
Royal Frankish Annals
The Royal Frankish Annals or Annals of the Kingdom of the Franks ,are annals covering the history of early Carolingian monarchs from 741 to 829. Their composition seems to have soon been taken up at court, providing them with markedly official character...

. It marked the 12 hours with balls of brass falling on a plate every hour, and also had twelve horsemen who appeared in turn at each hour.

The 797 embassy, the first one from Charlemagne, was composed of three men, the Jew Isaac (Isaac Judaeus, probably as interpreter), Lantfrid and Sigimud, and Harun al-Rashid was described as "Aaron, king of the Persians". Four years later in 801, an Abassid embassy arrived in Pisa
Pisa
Pisa is a city in Tuscany, Central Italy, on the right bank of the mouth of the River Arno on the Tyrrhenian Sea. It is the capital city of the Province of Pisa...

, composed of "a Persian from the East" and one envoy "Emir Abraham, probably Harun al-Rashid's governor in North Africa
North Africa
North Africa or Northern Africa is the northernmost region of the African continent, linked by the Sahara to Sub-Saharan Africa. Geopolitically, the United Nations definition of Northern Africa includes eight countries or territories; Algeria, Egypt, Libya, Morocco, South Sudan, Sudan, Tunisia, and...

, Ibrahim ibn al-Aghlab, with news about Jew Isaac that he was returning with numerous presents. They met with Charlemagne who was present in Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 at that time.

In 799, Charlemagne sent another mission to the Patriarch of Jerusalem.

Apparently led by encouragements from Spain, Louis the Pious
Louis the Pious
Louis the Pious , also called the Fair, and the Debonaire, was the King of Aquitaine from 781. He was also King of the Franks and co-Emperor with his father, Charlemagne, from 813...

, king of Aquitaine
Aquitaine
Aquitaine , archaic Guyenne/Guienne , is one of the 27 regions of France, in the south-western part of metropolitan France, along the Atlantic Ocean and the Pyrenees mountain range on the border with Spain. It comprises the 5 departments of Dordogne, :Lot et Garonne, :Pyrénées-Atlantiques, Landes...

, captured Barcelona
Barcelona
Barcelona is the second largest city in Spain after Madrid, and the capital of Catalonia, with a population of 1,621,537 within its administrative limits on a land area of...

 in 801, but failed to extend his conquests to Tortosa
Tortosa
-External links:* *** * * *...

, which would remain Muslim for the next 300 years.

In 802, a second embassy was sent by Charlemagne, which returned in 806.

In 807, Rodbertus, Charlemagne's ambassador died as he returned from Persia. Harun al-Rashid is also reported to have offered the custody of the Holy places in Jerusalem to Charlemagne. In 807, Abdallah, "sent by the king of the Persian", reached Charlemagne in Aachen
Aachen
Aachen has historically been a spa town in North Rhine-Westphalia, Germany. Aachen was a favoured residence of Charlemagne, and the place of coronation of the Kings of Germany. Geographically, Aachen is the westernmost town of Germany, located along its borders with Belgium and the Netherlands, ...

 accompanied by two monks from Jerusalem, George (a German named Egilbaldus, prior of the Monastery of the Mount of Olives
Mount of Olives
The Mount of Olives is a mountain ridge in East Jerusalem with three peaks running from north to south. The highest, at-Tur, rises to 818 meters . It is named for the olive groves that once covered its slopes...

) and Felix, envoys of the Patriarch Thomas. They also brought many gifts, including a clock ("Horologium").

The third and final embassy was sent by Charlemagne in 809, but it arrived after Harun al-Rashid had died. The embassy returned in 813 with messages of friendship, but little concrete results.

Artistic influences

From Carolingian
Carolingian
The Carolingian dynasty was a Frankish noble family with origins in the Arnulfing and Pippinid clans of the 7th century AD. The name "Carolingian", Medieval Latin karolingi, an altered form of an unattested Old High German *karling, kerling The Carolingian dynasty (known variously as the...

 times, various Islamic influences seem to appear in Christian religious architecture such as the multi-colored tile designs which may have been inspired by Islamic polychromy in the 800 CE gatehouse at Lorsch Abbey
Lorsch Abbey
The Abbey of Lorsch is a former Imperial Abbey in Lorsch, Germany, about 10 km east of Worms, one of the most renowned monasteries of the Carolingian Empire. Even in its ruined state, its remains are among the most important pre-Romanesque–Carolingian style buildings in Germany...

.

Horseshoe
Horseshoe
A horseshoe, is a fabricated product, normally made of metal, although sometimes made partially or wholly of modern synthetic materials, designed to protect a horse's hoof from wear and tear. Shoes are attached on the palmar surface of the hooves, usually nailed through the insensitive hoof wall...

 arches, as well as the centralized plan, found in Carolingian churches such as Germigny-des-Prés
Germigny-des-Prés
Germigny-des-Prés is a commune in the Loiret department in north-central France.-Carolingian architecture:The oratory at Germigny-des-Prés was built by Bishop Theodulf of Orléans in 806 as part of his palace complex within the Gallo-Roman villa in Germaniacus...

 suggest influence from the Mozarabic architectural designs of Islamic Spain. Early Carolingian architecture generally combines Roman
Roman architecture
Ancient Roman architecture adopted certain aspects of Ancient Greek architecture, creating a new architectural style. The Romans were indebted to their Etruscan neighbors and forefathers who supplied them with a wealth of knowledge essential for future architectural solutions, such as hydraulics...

, Early Christian
Christian
A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

, Byzantine
Byzantine
Byzantine usually refers to the Roman Empire during the Middle Ages.Byzantine may also refer to:* A citizen of the Byzantine Empire, or native Greek during the Middle Ages...

, Islamic and Northern European designs.

In the Byzantine Empire
Byzantine Empire
The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

 from 723 to 842, Islam and Judaism
Judaism
Judaism ) is the "religion, philosophy, and way of life" of the Jewish people...

 influenced a Christian movement towards the destruction of images this time, an event known as "Iconoclasm
Iconoclasm
Iconoclasm is the deliberate destruction of religious icons and other symbols or monuments, usually with religious or political motives. It is a frequent component of major political or religious changes...

". According to Arnold Toynbee, it is the prestige of Islamic military successes in the 7-8th centuries that motivated Byzantine Christians into evaluating and adopting the Islamic precept of the destruction of idolatric images. Charlemagne
Charlemagne
Charlemagne was King of the Franks from 768 and Emperor of the Romans from 800 to his death in 814. He expanded the Frankish kingdom into an empire that incorporated much of Western and Central Europe. During his reign, he conquered Italy and was crowned by Pope Leo III on 25 December 800...

 himself attempted to follow the iconoclastic precepts of the East Roman Emperor Leo Syrus, but this was stopped by Pope Hadrian I.

Aftermath

It seems that in 831, Harun al-Rashid's son al Ma'mun also sent an embassy to Louis the Pious
Louis the Pious
Louis the Pious , also called the Fair, and the Debonaire, was the King of Aquitaine from 781. He was also King of the Franks and co-Emperor with his father, Charlemagne, from 813...

. These embassies also seem to have had the objective of promoting commerce between the two realms.

After 814 and the accession of Louis the Pious
Louis the Pious
Louis the Pious , also called the Fair, and the Debonaire, was the King of Aquitaine from 781. He was also King of the Franks and co-Emperor with his father, Charlemagne, from 813...

 to the throne, internal dissensions prevented the Carolingians from further ventures into Spain.

Almost a century later Bertha
Bertha, daughter of Lothair II
Bertha was the second illegitimate daughter of Lothair II, King of Lotharingia, by his concubine Waldrada. She was renowned to be beautiful, spirited, and courageous. Ambition, coupled with her influence, involved her husbands in many wars....

, daughter of Lothar II and mother of several tenth-century Italian kings, is reported to have sent an embassy to the Abbasid caliph Al-Muktafi
Al-Muktafi
Al-Muktafi was the Abbasid Caliph in Baghdad from 902 to 908. He was the son of the previous Caliph, al-Mu'tadid, by a Turkish slave-girl. In command of ar Raqqah at the time of his father's death, he at once returned to the Capital, where he became a favorite of the people for his generosity,...

, requesting friendship and a marital alliance.
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