Ernst Bernhardt Lohrman (1803–1870), architect at the office of the State Intendant, designed a new crown granary for Raahe in 1849. The brick granary was completed in 1852, and its capacity was 12,000 grain barrels (one barrel being 165 litres). The Crown Granary functioned as the State’s grain storage until 1910, so all in all, it served its original purpose for over 50 years.

Following this, the Finnish Defence Forces took over the running of the Crown Granary and used it as the main storage facility of the Raahe military district until 1993. In 1995, the town of Raahe rented this cultural historic granary and it was used as a cold storage facility until the town of Raahe finally bought the building from the State in 2001.

The Crown Granary of Raahe is a storage, exhibition and office space for the museum. The Crown Granary opened to the public on 21 October 2012, the 150th anniversary of the Raahe Museum.

Current the famous "Old Gentleman" of Raahe is housed here along with multimedia presentations of Raahe.