Ottawa's former industrial appearance was vastly altered by the 1950 Greber Plan. Prime Minister Mackenzie King hired French architect-planner Jacques Greber to design an urban plan for managing development in the National Capital Region, to make it more aesthetically pleasing and more befitting a location for Canada's political centre. Greber's plan included the creation of the National Capital Greenbelt, the Parkway, the Queensway highway system, the relocation of downtown Union Station (now the Senate of Canada Building) to the suburbs, the removal of the street car system, the decentralization of selected government offices, the relocation of industries and removal of substandard housing from the downtown and the creation of the Rideau Canal and Ottawa River pathways to name just a few of its recommendations. In 1958, the National Capital Commission was established as a Crown Corporation from the passing of the National Capital Act to implement the Greber Plan recommendations-which it accomplished during the 1960s and 1970s.