Hamburg’s head of government is called the First Mayor.

The Senate governs; the Bürgerschaft is parliament.

Hamburg’s Bürgerschaft elects the head of government by a majority of its statutory membership. The elected person then appoints the Second Mayor and the other senators and seeks the Bürgerschaft’s confirmation. The population therefore does not elect the First Mayor in a separate direct election.

The First Mayor directs the Senate’s business and sets political guidelines, remaining accountable to the Bürgerschaft for them. The Senate as a whole directs and supervises the administration. The distinctive title does not change the fact that Hamburg has a state government accountable to parliament.

The other three answers

Not every similar political title identifies Hamburg’s head of government.

The question asks for the office’s title, not a person’s name.

The officeholder can change. The answer remains the title used in the constitution. A change during an ongoing parliamentary term is also possible: the Bürgerschaft can elect a successor with the required majority, thereby withdrawing confidence from the previous head of government.

The President of the Bürgerschaft, by contrast, presides over parliament. This is a different office from President of the Senate. Always check the institution following the title: Bürgerschaft refers to parliament, Senate to government.