Subsequent decades saw the federal government embrace modernism. The attitude towards government buildings also changed. In earlier eras, all government buildings were considered to be important symbols of the country, and designed to be both monumental and functional. However, by the 1960s, efficiency and cost effectiveness were the main goals of government projects. The many government structures built during this era thus tend to be models of International Style minimalism, unornamented, with no attempt at distinctiveness. Moreover, in an era of political discontent over high taxes it was even a priority that the buildings not be cheap, but also look cheap so that visitors from the regions wouldn't feel that the federal government was wasting their money in Ottawa. In this era the federal government decided to erect many of its new buildings outside of the downtown core. Partially for political reasons, the government of Prime Minister Pierre Trudeau opted to build a series of massive federal government office towers on the Quebec side of the border, most notably the Place du Portage and Terrasses de la Chaudière. In the western part of Ottawa a cluster of government buildings were built at Tunney's Pasture. The downtown core did see a great deal of building during this era, especially after the city eased its 150-foot height restriction on office towers. Examples include the Department of National Defence Headquarters by the canal and the Place de Ville complex, built by private developer Robert Campeau but largely housing government departments.