Shams al-Din Juvayni or Shams al-Din Muhammad ibn Muhammad ibn Muhammad al-Juwayni (died 1285) was a vizier

Vizier

A vizier or in Arabic script ; ; sometimes spelled vazir, vizir, vasir, wazir, vesir, or vezir) is a high-ranking political advisor or minister in a Muslim government....

 and sahib-divan or Minister of Finance under three Mongol Ilkhans

Ilkhanate

The Ilkhanate, also spelled Il-khanate , was a Mongol khanate established in Azerbaijan and Persia in the 13th century, considered a part of the Mongol Empire...

 - Hulagu

Hulagu Khan

Hulagu Khan, also known as Hülegü, Hulegu , was a Mongol ruler who conquered much of Southwest Asia...

, Abaqa and Tekuder

Tekuder

Ahmed Tekuder , also known as Sultan Ahmad , was the sultan of the Persia-based Ilkhanate, son of Hulegu and brother of Abaqa. He was eventually succeeded by Arghun Khan...

 - from 1263 until his execution by Arghun Khan

Arghun

Arghun Khan aka Argon was the fourth ruler of the Mongol empire's Ilkhanate, from 1284 to 1291. He was the son of Abaqa Khan, and like his father, was a devout Buddhist...

 in 1285. A member of a Persian secretarial dynasty from northern Khurasan

North Khorasan Province

North Khorasan Province is a province located in northeastern Iran. Bojnord is the centre of the province.Other counties are Shirvan, Esfarayen, Maneh-o-Samalqan, Jajarm, Faroj and Germeh....

, Shams al-Din was the brother of the historian Ata al-Mulk Juvayni

Ata al-Mulk Juvayni

Atâ-Malek Jovayni was a Persian historian who wrote an account of the Mongol Empire entitled Ta' rīkh-i jahān-gushā .He was born in Juvain, a city in Khorasan in northeastern Iran...

. Both brothers held influential positions in the independent khanate that Hulagu founded in Iran after the death of his brother Möngke Khan

Möngke Khan

Möngke Khan , born Möngke, , was the fourth Great Khan of the Mongol Empire from July 1, 1251 – August 11, 1259. He was the first Great Khan from the Toluid line, and made significant reforms to improve the administration of the Empire during his reign...

 in 1259.

A skillful political and military leader, he is also known to have patronized the arts. His wife Khoshak was the daughter of Awak Zak'arean-Mkhargrdzeli, Lord High Constable

Amirspasalar

Amirspasalar was the commander in chief of the medieval Georgian army and one of the highest officials of the Kingdom of Georgia, commonly rendered as Lord High Constable in English...

 of Georgia

Georgia (country)

Georgia is a sovereign state in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe, it is bounded to the west by the Black Sea, to the north by Russia, to the southwest by Turkey, to the south by Armenia, and to the southeast by Azerbaijan. The capital of...

, and Gvantsa

Gvantsa

Gvantsa was a Queen Consort of Georgia as the second wife of King David VII “Ulu” .She was the daughter of Kakhaber IV Kakhaberidze, Duke of Racha and Takveri, who married Gvantsa off to Prince Avag Mkhargrdzeli, Lord High Tutor and Lord High Constable of Georgia with whom she begot a daughter...

, a noblewoman who went on to become queen of Georgia.

In 1285, Arghun accused Shams al-Din of having poisoned the Ilkhan Abaqa, who may actually died of the effects of alcoholism

Alcoholism

Alcoholism is a broad term for problems with alcohol, and is generally used to mean compulsive and uncontrolled consumption of alcoholic beverages, usually to the detriment of the drinker's health, personal relationships, and social standing...

. Shams al-Din was duly executed and replaced as vizier by Buqa

Buqa

Buqa was a Mongol lord and chancellor who was instrumental in sweeping Arghun to power as the fourth Il-Khan of Iran in 1284 and became his chief minister and advisor, succeeding Shams ad-Din Juvayni whom Arghun had executed...

.

Harun Juvayni is one of his children.