Church of the Assumption of the Virgin Mary in Nový Bor, Baroque church in Nový Bor, Czech Republic.

The Church of the Assumption of the Virgin Mary is a baroque structure with white exterior walls, tall windows, and 18th-century architectural details. The building contains an original organ and is topped by a bell tower.

The church was built in 1786–1788 by the Děčín builder Johann Wenzel Kosch on the site of a wooden chapel destroyed by a storm, in the town then called Haida. It was consecrated on 15 August 1792 and given the title of deanery church. Its still-working bell dates from 1607, and it was listed as a cultural monument in 1958.

The parish belongs to the Litoměřice diocese and is among the liveliest in the Českolipský vicariate; Mass is celebrated most days of the week, with some services held in the Chapel of St Joseph in the parish office. The church joins the annual Night of Churches, and a youth group meets here, unusual for small towns in this diocese.

The church is open to visitors during set hours on most days, though group visits and indoor photography require prior arrangement. It is advisable to check opening times before your visit.

The oldest protected monument in Nový Bor is not a separate structure but the statue of the Virgin Mary flanking the main altar, inside the church. The organ came from Prague's Church of St. Charles Borromeo, suppressed under Joseph II.