The city's administration is headed by the mayor, who is the leader of the largest party on the communal council. After Xavier Bettel became Luxembourg's new prime minister on 4 December 2013, Lydie Polfer (DP) was sworn in as new mayor of Luxembourg on 17 December of the same year. The mayor leads the cabinet, the ''collège échevinal'', in which the DP forms a coalition with The Greens. Unlike other cities in Luxembourg, which are limited to four ''échevins'' at most, Luxembourg is given special dispensation to have six ''échevins'' on its ''collège échevinal''.