On the St George Basilica

Within the compound of Prague castle, there's another religious building - the St George Basilica and Convent.

The Convent of Saint George was a Benedictine convent located in the Prague Castle in the Czech Republic. Founded in 973, the convent was next to the seat of ecclesiastical and state power in Bohemia and occasionally the entire Holy Roman Empire, and played an important historical role. Although no longer active, the convent's building and the attached Bascilica dedicated to Saint George still exist; the building now houses the Czech National Gallery's collection of 19th century Bohemian art. - Wikipedia