Syrmia County (medieval)

[1] The county borders largely correspond to the modern-day Srem District in northwestern Serbia.

Manuel I Komnenos retrieved Syrmia in 1162,[2] defended it in 1167,[3] but latter Emperors lost it to former imperial Despot and sovereign King of Hungary, Béla III, sometime during the 1180s.

Up until January 1229, the Syrmia County was, in an ecclesiastical sense, subordinated as an archdiocese to the Archbishopric of Kalocsa.

[5] Then, Pope Gregory IX permitted the establishment of a new bishopric with seat in Bánmonostor (present-day Banoštor).

[5] After Serbian ruler Stefan Dragutin entered dynastic relations with Hungary, he received in 1284, among other territories, Belgrade, and Mačva, which was known as ulterior Sirmia in Papal documents.