Church of the Immaculate Conception, Roman Catholic parish church in Dubí, Czech Republic

The Church of the Immaculate Conception in Dubí is a three-nave basilica with a raised central nave, built in brick with marble details. Its west facade is made of 55 stripes of white and red marble, and a campanile-like tower stands by the presbytery. The church is 50 m long and 17 m wide, with a main nave 13.9 m high.

Built from 1897 to 1906 to plans by Pietro Bigaglia, a professor at the Venice Academy of Fine Arts, the church was financed by public collections and donations from Carlos Maria Prince of Clary and Aldringen. The Teplice builder Heinrich Siegmund carried out the work, and marble blocks fell from the facade in the 1920s and 1939, requiring repairs. It was consecrated on 21 October 1906.

The church hosts the Noc kostelů (Night of Churches) programme and serves both religious and cultural-social events. In the right aisle hangs a reused Gothic altarpiece panel with seven painted saints on punched gold ground, attributed to the Venetian master Jacobello di Bonomo (1370–1390); the original panels are now in the Diocesan Museum in Litoměřice.

The church stands in the upper part of Dubí, on the road leading to Cínovec, not in the town centre. It is a parish church, so entry depends on service times; the bells hang in the tall south tower, and the marble facade has shed blocks before, so look up rather than lean against it.

The church is considered the northernmost building of Venetian architecture. To reinforce that link, building material was brought from Italy, and old spolia from demolished Venetian churches were built into the exterior and interior under Pietro Bigaglia's supervision.