Dominikanerkirche St. Blasius in Regensburg, Gothic church in Regensburg, Germany.

Dominikanerkirche St. Blasius is a massive three-nave Gothic basilica without a transept, 73 metres long and 25 metres wide, built from 1229 for the Dominican order. Its six-bay nave and four-bay main choir, flanked by three-bay side choirs, carry cross-ribbed vaults; a removed rood screen leaves an open view from the portal to the choir. The roof turret is more than a simple ridge turret, and the church is twice as tall as Dominican rules prescribed.

The church was founded in 1229 and became one of Germany's largest mendicant order buildings, breaking the typical size rules that such communities usually followed. This growth reflected the Dominican order's growing importance in the city.

The church is now the congregation church of the Marianische Männer-Congregation Regensburg, a men's Marian association, and Mass is celebrated there. Look for the kneeling monk carved on the easternmost service capital: he holds a set square and a large compass, tools of his work as site foreman, and the block beside him reads "Bruder Diemar".

After major restoration work, the building reopened in 2024 and is once again accessible to visitors. Regular Sunday evening services take place at 8:00 PM and are open to those interested in attending.

The church has no high bell tower, as is usual for mendicant order churches; only a small roof turret sits on the roof. The oversized height, twice what the order's customs prescribed, caused the side walls to drift apart under the roof load from the 17th century. Since 2015 steel cables and beams have been installed to stabilize the structure.