The Raahe Sea Museum (Pakkahuone) is the oldest privately founded museum in Finland. It was established in 1862 by doctor Carl Robert Ehrström, who was well-known for his varied cultural interests.

The oldest of the museum offices, The Packhouse, is located in the Old Customs House which was built in 1848 and has served as a Seaman's House.

The building has been preserved in nearly its original condition. The museum houses pieces of history which were donated in the 19th century: articles brought from distant countries by sailors as exotic souvenirs, these objects contributed to the establishment of the museum. Later on, articles related to Raahe’s own local history, such as women’s skilful handicraft, dishes and toys. The museum collection relates to Raahe’s history and success as a town for seamen and ship builders. The miniature sailboats, paintings of ships and navigation equipment are an integral part of our town’s marine history. The objects include several rarities, such as the wooden sculptures by Mikael Balt from the first church of Raahe in the 17th century. The sea museum is a “museum within a museum”.