Blackwell Armory The Blackwell Armory with it Art Deco architecture was built in 1925, and is listed on the National Register of Historic Places Blackwell, OK Historic Buildings Derailed Railroad Co. Museum - DISPLAY MOVED TO TOP OF OKLAHOMA MUSEUM, 303 South Main - Blackwell, OK Museums Hotel Blackwell, OK Historic Buildings Rowell House - 1899 Blackwell, OK Historic Homes Centennial Mural Blackwell, OK Arts