The Cathedral of St. Peter and St. Paul is located on the top of this hill, known as Petrov, on the presumed site of the former Brno castle (including a chapel) that dates from the 11th and 12th centuries. After the castle`s demise the free-standing Romanesque basilica was rebuilt as a Gothic cathedral in the 13th century, further modified in the 15th and 16th centuries, and converted to the Baroque style in the 18th century. Its current neo-Gothic form dates from the turn of this century. Since 1777 the cathedral has been the seat of the Brno bishopric. The original church crypt from the 12th century is now accessible to visitors.