Prague Castle has four churches. Most people focus on the visually dominate St. Vitus Cathedral. But St. George’s Basilica is also historically important. It was built in 920 and accompanied by a Benedictine convent 53 years later. The founder was Vratislaus I, Duke of Bohemia. He was the son of Bořivoj I who built the Přemyslid fort on Hradčany mountain that would become Prague Castle. This Roman Catholic church was extensively renovated during the 12th, 17th and early 20th centuries. It now doubles as a concert hall and houses the Bohemian Art Collection managed by the National Gallery of Prague.