 The building was designed by architects Allward and <unk> and by the engineering firm Stone and Webster Canada , Ltd. in 1965 . Colonel McLaughlin unveiled a model of the building at his 94th birthday celebration , which was held in his honour at the museum in September of that year . It was hoped that the building would be open by Canada 's centennial in 1967 , but construction delays forced the opening to October 26 , 1968 . 
