Lutheran church, Deák tér, Lutheran church in Belváros-Lipótváros, Budapest, Hungary

The Lutheran Church at Deák Square is a neoclassical hall church with a temple front of four Doric pilasters and a triangular pediment, built without a tower. Its rectangular nave measures 33 metres long, 18.2 metres wide and 14.8 metres high, with two-storey galleries over the entrance. The gilded altar is flanked by columns of two kinds of marble.

The Lutheran congregation of Pest formed in 1787 after Joseph II's tolerance patent, and construction of the church began with the laying of the foundation stone on 31 October 1799 to plans by Mihály Pollack, his first work in Hungary. Money shortages during the Napoleonic wars slowed the work, and the church was consecrated on 2 June 1811. After Pollack's death in 1855, József Hild added the temple-front facade with Doric columns in 1856; in 1875 the unstable small tower was removed.

The church is the centre of the Deák tér Lutheran congregation, with services on Sundays and feast days. Since 1985 it has hosted the Deák tér Organ Music Devotions, and since 1990 the Budapest Bach Week each June. A marble plaque on the facade records that Lajos Kossuth had his sons Ferenc and Lajos Tivadar baptised here.

The building is located at Deák Ferenc tér 4 in central Budapest with good accessibility via several metro lines and bus routes. The location makes it easy to reach on foot or connect with other central destinations.

The area around the church became known as 'Insula Lutherana' because several Protestant institutions like a school, pastoral office, and kindergarten were concentrated there. This cluster of facilities made the square a center for Lutheran community life.