The buildings were designed by WZMH Architects and built by CANA Construction Company Limited. Located in downtown Calgary, the buildings are directly connected by the Plus 15 skywalk system to Fifth Avenue Place to the north and Suncor Energy Centre to the east. A shopping gallery is located at the +15 level as well as ground level and contains retail, recreation, services and financial services. Construction started in 1972 and ended in 1981 with the fourth tower. The complex itself is made of towers; 205-5TH Avenue SW, 255-5TH Ave SW, 202-6TH Ave SW, and 250-6TH Ave SW.