Reformed Church Haldenbühl, Protestant church building in Gossau, Switzerland

The Reformed Church Haldenbühl is a neo-baroque central building on a cruciform plan, completed in 1900 to designs by Zurich architects Pfleghard and Haefeli. Its cross arms are covered by mansard roofs, and an octagonal lantern with a cinched hood rises above the ridge intersection. The southeast corner holds the tower, topped by a lantern onion dome over round clock gables. Granite forms the base, while tuff stone frames the windows, doors, pilasters and cornices against white wall panels.

In the early 19th century Gossau was entirely Roman Catholic. From 1840 Protestant farming families from Bern bought up unprofitable grain farms and switched them to dairy, and industrialisation in the 1860s brought more non-Catholic workers; by 1888 there were 896 Protestants, who belonged to the Flawil parish. A church association founded in 1896 became an independent parish on 28 June 1897, and the church, designed by Pfleghard and Haefeli of Zurich, was handed over on 16 December 1900 under pastor August Lutz.

The name Haldenbüel refers to the hill where the church was built in 1900. The congregation had been separated from Flawil only in 1897, and the church became the centre of the new parish. Services are still held here, and the building is listed as a class B cultural property of regional significance.

The church stands on the Haldenbüel rise above Gossau, where the congregation chose the site in 1899. The granite base and tuff-stone window and door surrounds can be seen from outside at any time; the interior is open for services. The whole complex was restored between 1985 and 1986 under the cantonal monument office and reconsecrated on 17 May 1986.

The church was built to a design by the Zurich architects Pfleghard and Haefeli, chosen in 1899 after the congregation had considered the Haldenbüel site. The foundation is granite, while the window and door surrounds, pilasters and cornices are tuff stone framing white wall panels.