A chamber of commerce (also referred to in some circles as a board of trade) is a form of business network, e.g., a local organization of businesses whose goal is to further the interests of businesses. Business owners in towns and cities form these local societies to advocate on behalf of the business community. Local businesses are members, and they elect a board of directors or executive council to set policy for the chamber. The board or council then hires a President, CEO or Executive Director, plus staffing appropriate to size, to run the organization.
It took more than 65 years, until it was followed by another official chamber of commerce, probably in Brugge, Belgium). 
The world's oldest English-speaking chamber of commerce is that of New York City, which was established in 1768.
The largest chamber of commerce in the United Kingdom is Greater Manchester Chamber of Commerce with more than 5,000 members. The oldest known existing chamber in the English-speaking world with continuous records is the Glasgow Chamber of Commerce which was founded in 1783. However Leeds Chamber of Commerce is the UK's oldest followed by Belfast, Northern Ireland.