Tvrz Čelákovice, Medieval fortified house in Čelákovice, Czech Republic.

Tvrz Čelákovice is a Gothic-Renaissance fortress formed by two adjoining rectangular buildings on a spur above an Elbe arm, next to the Church of the Assumption of the Virgin Mary. The southern wing is the original Gothic core, once one storey higher and lowered in 1730; the northern storeyed tract was added at the end of the 15th century. The main building again bears psaníčkové sgrafito after the 1973–1982 reconstruction.

The structure was built around 1300 as a fortified residence and underwent several transformations over the centuries. A major restoration between 1973 and 1982 preserved its medieval character for future generations.

The fortified house now serves as the Town Museum, showcasing discoveries from different periods in the region's past. Visitors can walk through exhibition rooms that reveal how people lived and settled in this area over centuries.

The fortress stands on a promontory above an Elbe arm, beside the Church of the Assumption of the Virgin Mary. The Town Museum has occupied the buildings since 1949, so access follows museum opening hours rather than a separate fortress ticket. The south wing was lowered by one storey in 1730, which makes the two wings uneven in height.

The south wing of the fortress was originally one storey taller; it was lowered in 1730 because the building was in poor condition. The 1973–1982 reconstruction restored the Renaissance look, and the main building again carries psaníčkové sgrafito, a scratched facade pattern of small rectangles.