The Government of Canada, French: Gouvernement du Canada, or more formally Her Majestys Government (French: Gouvernement de Sa Majesté), is the federal administration of Canada. It is based in the national capital of Ottawa, Ontario. The head of government is Prime Minister Justin Trudeau, whose party the Liberal Party of Canada won the majority of seats in the Canadian Parliament in the 2015 Canadian federal election. In Canadian English, the term can mean either the collective set of institutions or specifically the Queen-in-Council. In both senses, the construct was established at Confederation—through the Constitution Act, 1867—as a federal constitutional monarchy, wherein the Canadian Crown acts as the core, or "the most basic building block," of its Westminster-style parliamentary democracy. The Crown is thus the foundation of the executive, legislative, and judicial branches of the Canadian government. Further elements of governance are outlined in the rest of the Canadian constitution, which includes written statutes, court rulings, and unwritten conventions developed over centuries. In Canadian English, the word government is used to refer both to the whole set of institutions that govern the country (as in American usage, but where Britons would use state), and to the current political leadership (as in British usage, but where Americans would use administration).