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 institution outside the United States, the American College of Sofia, was founded in Plovdiv in 1860 and later moved to Sofia. On 5 September 2014, Plovdiv was selected as the Bulgarian host of the European Capital of Culture 2019. This happened with the help of the Municipal Foundation "Plovdiv 2019″, a non-government organization, which was established in 2011 by Plovdiv's City Council whose main objectives were to develop and to prepare Plovdiv's bid book for European Capital of Culture in 2019. Plovdiv was given various names throughout its long history. The Odrysian capital "Odryssa" () is suggested to have been