Reformed church, Reformed Church in Trogen, Switzerland.

The Reformed Church of Trogen, built 1779–1782 by Hans Ulrich Grubenmann, has a tower with a curved Rococo hood and a main facade with Tuscan and Ionic pilasters, a dentil frieze and a triangular pediment. Inside, a flat barrel-vaulted hall with polygonal choir and L-shaped gallery holds greenish Rococo stucco by a Moosbrugger brother, a Carrara marble font and four ceiling paintings.

A church existed here by 1459, when Trogen's residents asked the Bishop of Konstanz for a parish church with cemetery, tower and font; it was enlarged in 1619. An earthquake on 9 December 1777 cracked the building, which was demolished from 17 March 1779 and rebuilt by Hans Ulrich Grubenmann; the first sermon followed on 30 January 1782.

The church hosts most rehearsals, introductions, concerts and recordings of the J. S. Bach Foundation's complete performance of Bach's vocal works under Rudolf Lutz. The four ceiling paintings were donated by Ursula Wolf-Zellweger, alone or with her husband Johann Conrad Wolf; the artist is unknown.

The church sits centrally on the village square and is easy to spot because of its distinctive Baroque facade. Visitors should note that it functions primarily as a place of worship and operating hours must be respected.

The four late-Baroque ceiling paintings in the choir and nave were donated by Ursula Wolf-Zellweger, alone or with her husband Johann Conrad Wolf; the painter is unknown. They include the Last Supper, Christ Blessing the Children, the Ascension and an allegory of the continents, among the earliest painted ceilings in Swiss Reformed church building.