For other uses of this term, see Moesia (disambiguation). Moesia

Moesia (in Serbian: Мачва, in Hungarian: Macsó) is a geographical region of Serbia, located mainly in the northwest of Central Serbia. It is located on a fertile plain between the river Sava and the river Drina. The main city of this region is Šabac. For several centuries the administration of Moesia was under the control of the monarch of the ancient Kingdom of Hungary, which was frequently entrusted to his family. The first to hold the title of king of Moesia was St. Ladislaus I of Hungary, who conquered that region under his reign. Later the title of regent or governor of Moesia was entrusted to Hungarian aristocrats, as was the case of Rostislav Mijaílovich, who was husband of the princess Ana of Hungary (1226-1285). After the death of Rostislav, his son Béla de Moesia occupied the position of its father, being also governor of Bosnia (1263-1272). After losing her husband and son, the Hungarian princess Ana became the regent of Moesia in 1274-1275, position that was granted her by her brother, the new king Esteban V of Hungary.

The modern Mačva District is located in Serbia. It is also the name of the region, although the Moesia region only includes the northern part of this district. A small part of northern Moesia is located in the autonomous province of Vojvodina, in the District of Sirmia.

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