Mariä Himmelfahrt, Catholic church in Fürstenberg, Bad Wünnenberg, Germany.

Mariä Himmelfahrt is a hall church built in 1756/58 in Fürstenberg, Bad Wünnenberg. It has a nave, a recessed three-sided choir to the east, a west facade tower with an eight-sided bent spire, and 1905 additions: a sacristy to the south and a north annex with the patron's box for the Westphalen family.

The hall church was built between 1756 and 1758. In 1905 a sacristy was added to the south of the choir and an annex with the patron's loge for the Westphalen family to the north. The baroque furnishings were made by Anton Joseph Stratmann on behalf of Friedrich Wilhelm von Westphalen, and the organ followed in 1846 from Georg Carl Kuhlmann.

The church is dedicated to the Assumption of Mary and belongs as St. Marien to the Pastoralverbund Wünnenberg in the Büren-Delbrück deanery of the Archdiocese of Paderborn. Its baroque furnishings were commissioned by Friedrich Wilhelm von Westphalen, and the north annex built in 1905 holds the patron's loge of the von Westfalen family.

The church stands in Fürstenberg, a district of Bad Wünnenberg in the Paderborn district; the sacristy was added on the south side in 1905 and the annex with the patron's loge for the Westphalen family on the north side. Visitors enter through the west facade tower, which is topped by an eight-sided knickhelm roof.

The organ on the gallery was built in 1846 by Georg Carl Kuhlmann and has 24 registers, two manuals and a pedal. The baroque furnishings — three altars, a choir screen and a pulpit — were made by Anton Joseph Stratmann for Friedrich Wilhelm von Westphalen.