Calvinist Church in Warsaw, Gothic Revival Protestant church in Muranów, Poland.

The Calvinist Church is a Protestant church building in the Muranów neighborhood featuring a three-nave hall layout with a five-sided chancel. A central tower rises prominently above the structure and defines the building's exterior profile.

Construction began in October 1866, when the cornerstone was laid; the neo-Gothic design came from congregation member Adolf Loewe, and Kazimierz Loewe supervised the works. Lack of funds stretched the building to 14 years, and the church was consecrated on 24 October 1880. From 1940 to 1942 it stood inside the so-called Protestant enclave, an area excluded from the Warsaw ghetto. Partly damaged in the war, it was repaired in stages and entered the monument register in 1965.

The name refers to the Evangelical-Reformed (Calvinist) parish, which still uses the building as its parish church. The neo-Gothic design came from a member of the congregation, architect Adolf Loewe, and his relative Kazimierz Loewe directed the works. Cast iron was among the materials used in construction.

The church stands at 74 Solidarności Avenue in Warsaw's Śródmieście district, on the site of the former Evangelical enclave of 1940–1942. The neo-Gothic tower, though shelled in the war, survived and remains the landmark to look for when approaching from the avenue.

From 1940 to 1942 the church stood inside the so-called Protestant enclave, an area surrounded on three sides by the Warsaw ghetto but never incorporated into it. The tower was shelled during the war yet survived, while two sacristies and the chancel with its wooden pulpit were damaged.