Evangelisch-reformierte Kirche, Gothic Revival church in Blumenthal, Germany

The Evangelical Reformed Church is a Gothic Revival building of 1877–1879 by architect Johannes Vollmer, his first independently designed structure. Its four-bay nave, transept and apse form a cross; the tower reaches 61.4 m including a 4 m finial, with the clock at about 31 m. The main axis deviates 45° from the usual east-west orientation, so the choir faces northeast.

The building was constructed between 1877 and 1879 following the designs of architect Johannes Vollmer, marking his entry as an independent church architect. The church's creation was closely tied to the desire of the wealthy financier Christian Heinrich Wätjen to expand his nearby estate.

The interior displays religious symbols in the windows, including the Christogram JHS, a crown of thorns, and a communion chalice, alongside an original pulpit from the 16th century. These furnishings shape the character of the space and tell of the reformed tradition of the place.

The church stands on a site whose main axis deviates about 45 degrees from the usual east-west orientation, so the choir faces north-east. The tower reaches 61.4 m including the 4 m cross and sphere, with the clock at roughly 31 m. The former parish churchyard is now the area around the parish house, the present Old Community House.

The financier Christian Heinrich Wätjen enabled the church construction through funding of 200,000 gold marks, driven by his desire to expand his nearby park and estate. This unusual connection between religious building and private wealth reveals how church and commerce intertwined in the 19th century.