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
Economy of Plovdiv which employs 300 high-qualified personnel. Another significant factory is Saninelli which produces cloth and has 1,400 employees. Plovdiv is the seat of one of the oldest breweries in the country, Kamenitza, founded in 1881. Currently Kamenitza is the leading national beer company with market share of 18%. The brewery is situated in the Eastern district and employs 650 workers. Due to the growing demand for business office space Business Park Plovdiv is going to be constructed in the district of Trakiya. The investment is for €68,000,000 and the future park will occupy a built area of 110,000 m². A commercial