The Jean P. Haydon Museum is a museum dedicated to the culture and history of the United States territory of American Samoa. The museum is located on the north side of Route 1 in Fagatogo, American Samoa, roughly opposite the main post office. The building in which it is located, formerly Navy Building 43 of Naval Station Tutuila, is itself historically significant as one of a few surviving buildings constructed by the United States Navy in 1917 with locally-fashioned rusticated concrete blocks. The building served as the naval base's commissary until 1950, when it was turned over to civilian administration and converted to the island's main post office. The post office moved to new facilities, and in 1971 the building was opened as the museum, which is named for the wife of then-governor