The Minister president (Ministerpräsident) is the head of state and government in thirteen of Germany's sixteen states. In Berlin, the Free Hanseatic City of Bremen and the Free and Hanseatic City of Hamburg the heads of the state hold different titles: * in Berlin Governing Mayor (Regierender Bürgermeister) (before 1951 Mayor/Bürgermeister) * in Bremen President of the Senate and Mayor (Präsident des Senats und Bürgermeister) * in Hamburg First Mayor (Erster Bürgermeister).