House of Commons of England
The first parliament to invite representatives of the major towns was Montfort's Parliament in 1265. At the "Model Parliament" of 1295, representatives of the boroughs (including towns and cities) were admitted. It became the rule that each county send two knights of the shire, and that each borough send two burgesses.   In 1341 the Commons met separately from the nobility and clergy for the first time, creating in effect an Upper Chamber and a Lower Chamber.  The clergy and nobility became the House of Lords.