From the Wikipedia page 
Częstochowa, pronounced [t͡ʂɛ̃stɔˈxɔva], is a city in southern Poland on the Warta River with 240,027 inhabitants as of June 2009. It has been situated in the Silesian Voivodeship (administrative division) since 1999, and was previously the capital of the Częstochowa Voivodeship (1975–1998). However, Częstochowa is historically part of Lesser Poland, not of Silesia, and before 1975 (see: Partitions of Poland), it belonged to the Kraków Voivodeship. Częstochowa is located in the Kraków-Częstochowa Upland. It is the 13th most populous city in Poland. It is the largest economic, cultural and administrative hub in the northern part of the Silesian Voivodeship.