A guildhall is either a town hall, or a building historically used by guilds for meetings and other purposes, in which sense it can also be spelled as "guild hall" and may also be called a "guild house". It is also the official or colloquial name for many of these specific buildings, many of which are now museums.
A type of guild was known in Roman times. Known as collegium, collegia or corpus, these were organised groups of merchants who specialised in a particular craft and whose membership of the group was voluntary. One such example is the corpus naviculariorum, the college of long-distance shippers based at Rome's La Ostia port. The Roman guilds failed to survive the collapse of the Roman Empire.
Merchant guilds were reinvented during Europe's Medieval period. In England, these guilds went by many different names including: fraternity, brotherhood, college, company, corporation, fellowship, livery or society, amongst other terms. In Europe, merchant guilds were known as natie, consulado, hansa. A fraternity formed by the merchants of Tiel in Gelderland (present-day Netherlands) in 1020 is believed to be the first example of a Medieval guild. The first instance of usage of the term, "guild", was the gilda mercatoria used to describe a body of merchants operating out of St. Omer, France in the 11th century and London's Hanse was formed in the 12th century. These guilds controlled the way that trade was conducted and codified rules governing the conditions of trade. Once established, merchant guild rules were often incorporated into the charters granted to market towns. By the 13th and 14th centuries, merchant guilds had acquired sufficient resources to erect guild halls in many major market towns.
In the United Kingdom, outwith Scotland, a guildhall is usually a town hall: in the vast majority of cases, the guildhalls have never served as the meeting place of any specific guild. A suggested etymology is from the Anglo Saxon "gild", or "payment"; the guildhall being where citizens came to pay their rates. For the Scottish municipal equivalent see Tolbooth.
The Low Countries used to have guildhalls in every city, often one gildenhuis (Dutch, literally "guild house") for each trade. They were often elaborate, ornate buildings, demonstrating the guild's status. Occasionally a single hall would be used by all the city's guilds.