Who becomes chancellor or prime minister of Germany?

The leader of the largest party in the Lower House of the Bundestag becomes the Chancellor, provided that he or she has an overall majority and subject to confirmation by the House. The German system of government, like that of most democracies, isn't keen on a head of the executive who can't get legislation passed. Since the foundation of the Federal Republic in 1949 all governments except one - that of Adenauer from 1957-61 - have been coalitions. Joncey