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