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 Rowell House - 1899 Blackwell, OK Historic Homes Hotel Blackwell, OK Historic Buildings Centennial Mural Blackwell, OK Arts Blackwell Municipal Golf Course Blackwell' Blackwell, OK Golf Courses