Sremska Mitrovica

…(582) to surrender Sirmium (now Sremska Mitrovica, Serbia). Meanwhile, the Slavs poured into Thrace, Thessaly, Illyricum, and other regions of Greece.

…himself (with a residence in Sirmium).

…with the ancient archbishopric of Sirmium, restored by the pope. Methodius’s elevation to archbishop angered the Frankish clergy, who regarded his archdiocese as their missionary field. He was captured and imprisoned. In 873 the pope ordered Methodius’s release, but he banned the Slavic liturgy. Methodius then returned to Moravia and…

…the capture of Sirmium (Sremska Mitrovica, Vojvodina), the key town of the Sava River valley. The Pannonian tribes, joined by the Dalmatians, revolted in 6 ce, posing the gravest threat to Italy since Hannibal’s invasion. After the revolt was put down, Pannonia was organized as a separate province in…