Harwelden was built in English Tudor style by Mary and Earl Harwell in 1926 and has 30 rooms, four levels, and seven fireplaces. The main floor rooms and stairway are decorated with hand carved wood designs . This elegant mansion is now the home of the Tulsa Arts and Humanities Council. It serves as a location for many of the Council's programs in arts education, literary arts, humanities and arts advocacy as well as a site for private functions. It is a beautiful structure both inside and out. From the rear it slopes West to a view of the Arkansas River.