The hall where a guild or corporation usually assembles; a townhall.

Guildhall is the home of the City of London. Local government has developed since 1411 at the historic building, from the ancient Court of Husting in Saxon London to the modern Court of Common Council which now sits in the Great Hall. It also plays host to a variety of formal and informal events throughout the year. Recent events held in the Guildhall range from the Queenâ€(tm)s Golden Jubilee lunch through to a tribute for comedian Spike Milligan, highlighting the diverse range of events that take place within its ancient walls each year.

the hall of a guild or corporation