Clifford Donald Wiens RCA (27 April 1926 – 25 January 2020) was a Canadian writer, poet, designer and architect. Clifford Wiens played a crucial role in the development of corporate modern architecture and the broader Expressionist Movement in postwar Mid-West Canada. Wiens was defined as a poetic architect and his projects reflect this through their communication with both the client and the user. This poetry was best shown in his work on the University of Regina Heating and Cooling Building.