A meeting hall owned and used by a medieval trade guild or craft association.
From gild (guild, alternate spelling/pronunciation) + hall. Medieval craft associations (guilds) met in dedicated halls to conduct business, set standards, and maintain order in their trades.
Guildhalls were the corporate headquarters of medieval times! In London, Guildhall still stands (rebuilt after the Great Fire of 1666) as one of the oldest continuously used buildings—it's basically the medieval equivalent of a modern corporate office where power deals happened.
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