The Pannonia Savia was an ancient Roman province. It was formed in the year 296, during the reign of emperor Diocletian. The capital of the province was Siscia (today Sisak). Pannonia Savia included parts of present-day Croatia, Slovenia, and Bosnia and Herzegovina. Motto: Senatus Populusque Romanus (SPQR) The Roman Empire at its greatest extent, c. ... Events Galerius conquers Ctesiphon on the Persians; in the following peace settlement he returns it in exchange of Armenia Pope Marcellinus I succeeds Pope Caius Allectus, sucessor by assassination to Britain, is defeated by Constantius Chlorus and Britain is returned to the Roman Empire Births Deaths Pope Caius Categories: 296... Gaius Aurelius Valerius Diocletianus ( 245â 312), born Diocles (Greek ÎιοκλήÏ) and known in English as Diocletian,[1] was Roman Emperor from November 20, 284 to May 1, 305. ... Sisak is a city in central Croatia at the confluence of the Kupa and Sava rivers, 57 km southeast of Croatian capital Zagreb with an elevation of 99 m. ... Sisak on the map of Croatia Sisak (German: Sissek, Hungarian: Sziszek, Italian: Siscia) is a city in central Croatia. ...