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
Plovdiv the city; Plovdiv has three professional teams. The city has PFC Botev Plovdiv, founded in 1912 and PFC Lokomotiv, founded in 1926. Both teams are a regular fixture in the top Bulgarian league. The rivalry between them is considered to be even more fierce than the one between Levski and CSKA of Sofia. There are two other football clubs in the city – Maritsa FC (founded in 1921) and Spartak Plovdiv (1947). Plovdiv is host of the international boxing tournament "Strandzha" which has taken place since 1949. In 2007, 96 boxers from 20 countries participated in the tournament. There is