St. Peter und Paul, Abbey church in Thierhaupten, Germany.

St. Peter and Paul is a three-aisled pillar basilica without a transept, with a west tower topped by a saddleback roof. Its core is Romanesque, with a sacristy added in 1309 and a Baroque interior from 1761–1765. The nave walls were repainted by Richard Holzner in 1956.

Thierhaupten Abbey was founded in the 8th century by Duke Tassilo III of Bavaria. Around 1170, Abbot Heinrich had the present Romanesque basilica built; the sacristy followed in 1309. A fire in 1504 destroyed the upper part of the south tower, and the side apses were removed around 1590. The monastery was dissolved in 1803 during secularisation; the last abbot, Edmund Schmid, bought the church in 1812 and gave it to the parish, where services resumed on 2 October 1812.

The parish church keeps the name of the abbey's patron saints, Peter and Paul, shown in glory in the choir fresco painted by Franz Joseph Maucher of Friedberg in 1764. The high altar from around 1700 carries a painting of Mary flanked by the two apostles by the Augsburg painter Johann Georg Knappich. A late Gothic Madonna from around 1480 stands on the Marian side altar.

The church is a three-aisled pillar basilica without a transept, topped by a west tower with a saddle roof; the sacristy chapel is attached as an annex. The south tower holds the nativity scene, the organ windchest since 2003 and the gas heating with chimney since 2016. Enter from the west tower side to follow the nave toward the choir.

The south tower holds the church's nativity scene, and since 2003 also the organ's windchest; since 2016 the tower has housed the gas heating with its chimney. From 1941 until the post-war years the tower carried only one bell, the 1543 weather bell cast by Gregor Löffler, whose inscription begins "Abt johannes Rumpfhart hat zv lob Got dise Gloggen laßen gießen".