European wars of religion of the German states and, to a lesser extent, the Low Countries and Italy, while bankrupting many of the powers involved. The war ended with the Treaty of Münster, a part of the wider Peace of Westphalia. During the war, Germany's population was reduced by 30% on average. In the territory of Brandenburg, the losses had amounted to half, while in some areas an estimated two thirds of the population died. The population of the Czech lands declined by a third. The Swedish army alone, which was no greater a ravager than the other armies of the Thirty Years' War,
Treaty on the Functioning of the European Union Maastricht treaty, which led to the formation of the European Union, saw the EEC Treaty renamed as the Treaty establishing the European Community (TEC) and renumbered. The Maastricht reforms also saw the creation of the European Union's three pillar structure, of which the European Community was the major constituent part. Following the 2005 referenda, which saw the failed attempt at launching a European Constitution, on 13 December 2007 the Lisbon treaty was signed. This saw the 'TEC' renamed as the Treaty on the Functioning of the European Union (TFEU) and, once again, renumbered. The Lisbon reforms resulted in the merging