Archbishopric of Spalathon or Spalatum (also Salona) was a Christian archbishopric with seat in Salona

Salona

Salona was an ancient Illyrian Delmati city in the first millennium BC. The Greeks had set up an emporion there. After the conquest by the Romans, Salona became the capital of the Roman province of Dalmatia...

 (modern Split), Dalmatia

Dalmatia (Roman province)

Dalmatia was an ancient Roman province. Its name is probably derived from the name of an Illyrian tribe called the Dalmatae which lived in the area of the eastern Adriatic coast in Classical antiquity....

 (modern Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

) in the early Middle Ages

Middle Ages

The Middle Ages is a periodization of European history from the 5th century to the 15th century. The Middle Ages follows the fall of the Western Roman Empire in 476 and precedes the Early Modern Era. It is the middle period of a three-period division of Western history: Classic, Medieval and Modern...

.

Eastern Roman Emperor Leo I (r. 457-474) appointed Glycerius

Glycerius

Glycerius was a Western Roman Emperor from 473 to 474. Elevated by his Magister militum, Gundobad, Glycerius’ elevation was rejected by the court at Constantinople, and he was ousted by Julius Nepos. He later served as the bishop of Salona in the early Catholic Church.-Rise to power:Sources on...

 as Bishop of Salona in 474, Glycerius had earlier served as Western Roman Emperor but was deposed by Julius Nepos

Julius Nepos

Julius Nepos was Western Roman Emperor de facto from 474 to 475 and de jure until 480. Some historians consider him to be the last Western Roman Emperor, while others consider the western line to have ended with Romulus Augustulus in 476...

.

Salona was ravaged by the South Slavs

South Slavs

The South Slavs are the southern branch of the Slavic peoples and speak South Slavic languages. Geographically, the South Slavs are native to the Balkan peninsula, the southern Pannonian Plain and the eastern Alps...

 (Sclaveni) in 614, but in its place, Spalatum subsequently emerged. In 639 the city was razed by the Slavs, and in 647 the city was rebuilt.

During the rule of Vladislav of Croatia

Vladislav of Croatia

Vladislav was a nephew and successor of Duke Borna of Littoral Croatia. He reigned, as Duke of Littoral Croatia, from February 821 to ca. 835.Most information about Vladislav is carried by the Royal Frankish Annals when it speaks about Borna's death...

 (821-835), all of Croatia except the Archdiocese of Nin was lost to the Patriarchate of Constantinople, under the jurisdiction of the Archbishopric of Spalatum.

Heads

• Glycerius
  Glycerius
  Glycerius was a Western Roman Emperor from 473 to 474. Elevated by his Magister militum, Gundobad, Glycerius’ elevation was rejected by the court at Constantinople, and he was ousted by Julius Nepos. He later served as the bishop of Salona in the early Catholic Church.-Rise to power:Sources on...
  
  , 474
• Natalis, 582 (20th)
• Maximus the Schismatic,
• Justin, 840
• Marinus, before 886
• Theodosius,

Sources

• The grand strategy of the Byzantine Empire By Edward Luttwak, p. 164
• History of the bishops of Salona and Split