Plovdiv city was possibly at times a vassal of Bulgaria or Venice. Ivan Asen II conquered the duchy finally in 1230 but the city had possibly been conquered earlier. Afterwards, Plovdiv was conquered by Byzantium. According to some information, by 1300 Plovdiv was a possession of Theodore Svetoslav of Bulgaria. It was conquered from Byzantium by George Terter II of Bulgaria in 1322. Andronikos III Palaiologos unsuccessfully besieged the city, but a treaty restored Byzantine rule once again in 1323. In 1344 the city and eight other cities were surrendered to Bulgaria by the regency for John V Palaiologos as the
PFC Lokomotiv Plovdiv prestigious tournaments. By 1944 the team is the biggest in the region of Plovdiv in terms of members, and has a dedicated following with its fans setting records for the period in attendance of football matches. In the mid-1930s the labour union of the railway workers and sailors establishes several cultural and sporting organisations across the country. The railway workers established their sports club in Plovdiv as well, since the city is one of the major travel centres in the country. On 13 June 1935 the club "ZSK Plovdiv" was founded, abbreviated from "Zheleznicharski Sporten Klub Plovdiv" meaning "the sporting