St. Aegidius is a Romanesque building (construction around 1120) directly opposite the Großcomburg. Some sources speak of a "magistra dominae" monastery on Kleinkomburg. There are no reliable indications of this.
St. Aegidius is a Romanesque basilica with a cruciform plan. In the dome of the apse and in the choir vault there are murals that were restored in 1878/79 on the basis of old traces. St. Aegidius is the only largely preserved Romanesque church in the region. The ceiling paintings with Christ as a treadmill in a wine press, from the early 12th century, are considered the oldest pictorial representation of this subject. A baroque high altar leaf survived the Romanization of the church in 1877. On the north side of the church, a Capuchin monastery was built in 1711-1713. From 1849 to 1872 the monastery served as the mother house of the Franciscan order, which is today in the Kl