St. Peter's Cemetery lies at the stone wall that merges into the bottom of the rock called the Mönchsberg. Many of the aristocratic families of Salzburg lie buried here alongside many other noted persons, including Nannerl Mozart, sister of Wolfgang Amadeus (4 years older than her better-known brother, Nannerl was also an exceptionally gifted musician). You can also see the Romanesque Chapel of the Holy Cross and St. Margaret's Chapel, dating from the 15th century. The cemetery and its chapels are rich in blue-blooded history; monuments to a way of life long vanished. You can also take a self-guided tour through the early Christian catacombs in the rock above the church cemetery.