According to medieval tradition, Duke Henry the Lion is considered the founder of St. Peter's Church. He had founded the parish church of St. Peter and the no longer existing St. Paul's Chapel at the Martinikirche to compensate the former chief apostles of St. Peter and St. Paul for their suppression by St. Blaise as patron saint. From the first building of this one of four parish churches in the old town, which fell victim to a fire in 1256, nothing is known anymore. From 1260, a basilica new building, of which only the 71 m high west tower is preserved. After a city fire in 1290, the third building was built, which included the still essentially preserved three-nave Gothic hall church of the 14th century. Around 1400, the Annen and Livinus chapels were added to the south side of the choir. The high, formerly lead-covered spire was repeatedly damaged by storm and lightning over the centuries. After 1811 a baroque dome replaced the gothic top. After the war devastation in 1944, a copper-covered pinnacle was built from 1969 to 1971 with a cock designed by Bodo Kampmann. The interior of the church is dominated by the heavy octagonal pillars.