The Ehrensvärd Museum, located on the bailey in the official residence of the fortress’s commandants, showcases the history of the Swedish period of the fortress. The first proprietor of the building was the founder of the fortress, Augustin Ehrensvärd.

The museum collection boasts several portraits, miniatures, weapons, Gustavian furniture as well as oil paintings of Suomenlinna dating back to the 1760s.

The museum is open daily during the summer season and on weekends in the spring and the autumn. The opening hours can be found in the calendar from attractions webpage.