The Cathedral of Saints Peter and Paul, built on the site of an ancient castle dominates the hill of Petrov. This is a late Gothic building of the thirteenth century, built on an ancient crypt, and rebuilt in Baroque style in 1743-1746 after the Swedes catch fire during the siege of 1645. 

The facade and the towers were completed in the early twentieth century. If you don't suffer from vertigo, climb one of the towers and you will be rewarded with panoramic views of the beautiful Chapel of the Lord's Anunuciación exceptional ebony altar.

One of the peculiarities are the noon bells that rings every day at 11 am to emember the year 1645 when the city, during the Thirty Years War, was besieged by Swedish troops. According to legend the Swedish general after three months and a half said that if he could not conquer the city until Petrov bells give the noon sites would stop and leave. The people of Brno then used a trick and bells ahead an hour and the Swedish army had to go.