overview opening hours This three-aisled basilica, measuring 75 m in length, 31 m in width and 27.5 m in height, is one of the largest religious buidings in Prague. The construction of the church in the style of a late Romanesque basilica was financed by a public collection, to which even the Emperor Ferdinand I the Gracious and Empress Caroline contributed. The church was consecrated on October 18, 1863 on the millennial anniversary of the arrival of the Slavic missionaries Cyril and Methodius. opening hours january—december mon—sun 8:00—19:00 regular roman catholic masses Su 9:30, 18:30 Mo 18:30 Tu 8:00 We, Fr 12:00 Th 18:00 more about opening hours opening hours january—december mon—sun 8:00—19:00 regular roman catholic masses Su 9:30, 18:30 Mo 18:30 Tu 8:00 We, Fr 12:00 Th 18:00