sentences:  The first formal site for businessmen to meet in Bristol was the Tolzey in 1614 which was built onto the south wall of All Saints' Church.The Exchange was built in 1743, originally for use by all commercial businesses in Bristol but once the Commercial Rooms opened in 1808 the Exchange became the headquarters of the corn trade.The first president of the Commercial Rooms was John Loudon McAdam, inventor of tarmac, in 1808.