Town hall

In local government, a city hall, town hall, civic centre, guildhall, or municipal building is the chief administrative building of a city, town, or other municipality. It usually houses the city or town council, its associated departments, and their employees. It also usually functions as the base of the mayor of a city, town, borough, county or shire, and of the executive arm of the municipality.

By convention, until the middle of the 19th century, a single large open chamber formed an integral part of the building housing the council. The hall may be used for council meetings and other significant events. This large chamber, the "town hall" has become synonymous with the whole building, and with the administrative body housed in it. The terms "council chambers", "municipal building" or variants may be used locally in preference to "town hall" if no such large hall is present within the building.

Source: Wikipedia