Bruder Klaus, Catholic parish church in Gundelfingen, Breisgau, Germany

Bruder Klaus is a Catholic church oriented to the east, with a rectangular nave, a narrower choir set slightly higher and a sacristy attached to it, and a tower on the north side near the entrance facade. All parts have shallow pitched gable roofs. Inside, a plain hall is lit by rectangular concrete windows with clear glass, under a wooden ceiling with a ribbed structure; the choir back wall of natural stone shows a large cut-stone figure of the blessing Christ. On the gallery above the entrance stands a 1992 organ by Johannes Rohlf with 24 stops on two manuals and pedal, and two cymbal stars visible in the light-wood case with silver pipes.

Planning for a separate church began in 1958, after Catholics in formerly Baden Gundelfingen had long used the Protestant church as guests. Construction ran from 1961 to 1966: the foundation stone was laid in 1962, the topping-out ceremony followed in 1963, and the provisional blessing took place on 17 November 1963. The formal consecration was on 12 June 1966.

The patron is Niklaus von Flüe (1417–1487), a Swiss farmer, hermit and mystic canonised in 1947, who called himself only Bruder Klaus. The parish belongs to the Seelsorgeeinheit Freiburg Nord in the Archdiocese of Freiburg, together with St. Urban, St. Konrad und Elisabeth and St. Blasius in Freiburg.

The church stands in the southern part of Gundelfingen, away from the old centre, so it is reached on foot or by bike rather than passed en route. The nave is lit by rectangular concrete-framed windows of clear glass, and the choir wall of natural stone with its large stone-cut figure of the blessing Christ is the first thing to look for inside. The organ, built in 1992 by Johannes Rohlf, sits on the gallery above the entrance.

The 1992 organ by Johannes Rohlf (Opus 92) has 24 stops on two manuals and pedal, plus two Zimbelsterne visible in the light-wood case. The four bronze bells cast by Friedrich Wilhelm Schilling in 1973 hang in the tower; bell 1 strikes the hour, the others each quarter-hour, and dials on all four tower sides show the time.