In 1515 the Court of Aldermen of the City of London established what trade as top (based on economic/political power) of an enduring list of livery companies?
Mercers' Hall The Mercers' Company Mercers Company Mercers' Company Worshipful Company of Mercers Mercers Mercers' Guild
mercers guild mercers hall mercers company worshipful company of mercers mercers
mercers
WikipediaEntity
Mercers