 Most of federal subjects are headed by governors or presidents, but the office of the head of Moscow is called "Mayor of the City of Moscow", according to the Charter of the city of Moscow.Sergey Sobyanin, the incumbent Mayor of Moscow, was re-elected for a new term in 2018.The separate office of the "Premier of the Government of Moscow" existed in 1991-2001 (Yuri Luzhkov was the only officeholder), but it was merged with the office of Mayor of Moscow.