Věžový dům Ostrčilova, Modernist skyscraper in Ostrava, Czech Republic.

The Věžový dům Ostrčilova is a 68-meter experimental residential tower with 22 floors on Ostrčilova Street 2691/4 in Ostrava. Built to withstand mining subsidence, it was the tallest residential building in Czechoslovakia at the time. It is Ostrava's tallest house and third-tallest building after the New Town Hall and the Bolt Tower.

Built between 1965 and 1968 as an experimental residential tower meant to withstand mining subsidence, it was the tallest residential building in Czechoslovakia at the time. Water leaked into the flats soon after, and a renovation in 1976–1978 turned it into offices. It has stood empty since 2013.

The building embodies late modernist design principles and shows how Ostrava transformed its city center during the socialist era. The architecture reflects the period's belief that tall structures could redefine urban living.

The whole tower has been closed and inaccessible since 2013 because of inadequate fire protection and other technical faults, so it cannot be visited. The building stands on Ostrčilova Street 2691/4 in Ostrava, and its future depends on the reconstruction designed by Eva Jiřičná, which is to strip it back to its skeleton.

The building was constructed using the experimental V-OS system, an innovative construction method of its time that combined a prefabricated concrete core with flexible interior walls. This approach was unusual for the early 1970s and shows the technical ambition behind the project.