The Mayor of Baltimore is the head of the executive branch of the government of the City of Baltimore, Maryland. The Mayor has the duty to enforce city laws, and the power to either approve or veto bills passed by the Baltimore City Council. In addition, the Mayor oversees all city services, public property, police and fire protection, most public agencies, and the public school system within the city limits. As of January 1, 2013, the Office of Mayor of the City of Baltimore has changed hands 59 times with 49 different individuals assuming office.