Primarily Romanesque in style, it is part of the collection of buildings that comprise the castle, the political capital of the nation, and the spiritual center of the Czech state.

The original three-nave building was completed with a choir, a tribune for the nuns of the convent and a crypt.

In 1142, Conrad III entered Bohemia to reinstate his brother-in-law Vladislaus II as duke.

During the 15th century, the monastery was devastated during the Hussite Wars and rebuilt after the return of the Benedictines under Sigismund of Luxembourg.

Between 1608 and 1612, the Abbess Sophia of Helfenburg had a large choir for the nuns built in the western part of the central nave.

[8] In the 1780s, the condition of the buildings had deteriorated when Joseph II disbanded the monastic orders,[9] and the monastery and basilica were repurposed and used by the army.

With the exception of some elements of the façade, and interior of the church, the basilica has maintained the Romanesque style from the restoration after the fire in Prague Castle in 1142.

[10] Unlike the baroque and rococo churches of Prague, the interior of the basilica is simple and austere limestone block.

The building now houses the 19th century Bohemian Art Collection of National Gallery Prague.