 They include the Old Town ("Stare Miasto"), once contained within the city defensive walls and now encircled by the Planty park; the Wawel District, which is the site of the Royal Castle and the cathedral; Stradom and Kazimierz with its historic Jewish quarter, the latter originally divided into Christian and Jewish quarters; as well as the ancient town of Kleparz.Major districts added in the 19th and 20th centuries include Podgórze, which until 1915, was a separate town on the southern bank of the Vistula, and Nowa Huta, east of the city centre, built after World War II.Among the most notable historic districts of the city are