The church St. Gumbertus is one of the central city churches of Ansbach, Bavaria, together with the neighboring St. Johannis. Located in the Altstadt (old town) of Ansbach, St. Gumbertus, now a Lutheran church, was originally the church of a monastery that was founded by St. Gumbert around 750. Today it serves as a venue for concerts of the music festival Bachwoche Ansbach. The church contains the oldest structures in Ansbach and is considered Ansbach's city symbol.
Gumbert, who was later proclaimed a saint, around 750 founded a monastery dedicated to Mary, following the Benedictine Rule. In the 11th century it was converted to a Chorherrenstift or collegiate church. George, Margrave of Brandenburg-Ansbach, followed the Reformation in 1528; under the principle Cuius regio, eius religio the monastery was dissolved in 1563. One of the treasures of the monastery was the Gumbertus Bible, written in Regensburg or Salzburg in the late 12th century. In 1195 it was purchased by the monastery; it is now MS. 1 in Erlangen University Library.
The St. Gumbertuskirche combines changing architectural styles. The oldest constructions in Ansbach are found in the crypt (around 1040), the pantheon of the Margraves of Ansbach and the only surviving parts of the original church. The Georgskapelle (St. George's Chapel) dates to the 14th century. The nave was originally Romanesque, the choir Gothic. The choir was transformed in the 16th century to a chapel Schwanenritterkapelle (Swan Knights Chapel), housing "elaborate epitaphs and death shields of members of the Order of the Swan, a lay foundation of Margarve Albrecht Achilles." The whole building was changed in 1738 to a Repräsentationskirchenbau (representative church) by Charles William Frederick, Margrave of Brandenburg-Ansbach, under architect Leopold Retty. The nave was remodelled into a preaching hall in a restrained palette of gray and cream, built to cater to the Lutheran concentration on preaching, without the embellishments of side altars. The marble altar and the pulpit are main attractions of the church.