Cașin Church, Orthodox church in northern Bucharest, Romania

Cașin Church is a Romanian Orthodox church on Bulevardul Mărăști, near Arcul de Triumf. Its triconch plan measures 42 by 29 metres, with three apses and a main polygonal dome reaching 50 metres, surrounded by four smaller octagonal domes. Twelve stone steps lead to an open portico of five frontal and two side arches on paired white marble columns; the entrance doors carry bronze bas-reliefs of Saints Peter and Paul and the Archangels Michael and Gabriel.

Construction started in 1935 under architect Dimitrie Ionescu-Berechet with government support from the Ministry of Agriculture. Interior decorative elements were completed over several decades afterward.

The church displays traditional Orthodox artistic forms through its decorations and religious images. Visitors can observe how local Orthodox communities gather here for their spiritual practices and celebrations.

The building is open for religious services and community events, though visitor facilities are limited for sightseeing purposes. Guests should follow standard dress codes and behavioral expectations for Orthodox religious spaces.

The church is nicknamed Cașin Monastery after a street that bore the name of Mănăstirea Cașin in Bacău County, where fighting took place in the First World War. The name does not indicate a monastic community; the building is a parish church dedicated to the Archangels Michael and Gabriel and to Saint Catherine.