Ostravské muzeum, Municipal museum at Masaryk Square, Ostrava, Czech Republic.

Ostravské muzeum occupies a historical building on Masaryk Square and houses collections focused on social sciences, natural sciences, and regional history. The galleries display objects from different periods that trace the development of the area and its inhabitants.

The first written mention of the Old Town Hall dates from a 1539 deed recording a dispute between Jan Sedlnický of Choltice and the town of Moravská Ostrava. The tower was rebuilt in Baroque style in 1727, the building in Empire style between 1831 and 1837, and the facade given Neo-Renaissance form in 1874–1875. After more than 400 years the town council left in 1931, and the museum opened here on 4 October 1931.

The museum's ethnographic collection holds painted furniture, work tools, folk costumes, glass paintings and sculptures from the Ostrava region. The separate music-history collection covers classical music, folklore studies and the history of theatre in Ostrava.

The museum is easy to locate and centrally positioned, making it convenient to reach on foot. During warmer months, visitors can also climb the building's tower for elevated views of the surrounding area.

During the 2004–2006 renovation, remains of stone walls, probably from the 14th century, were uncovered beneath the ground floor. The rescue dig also yielded kitchen pottery, fragments of glass goblets and a silver Prague groschen struck under John of Luxembourg, pushing the site's history back some two hundred years.