The Halle aux blés (Wheats Exchange or Grains Exchange) was a circular building in central Paris used by grain traders built in 1763–67, with an open-air interior court that was capped by a wooden dome in 1783, then by an iron dome in 1811. In a major reconstruction in 1888–89 much of the structure was replaced and the building became the Bourse de commerce. The structure influenced the design of public buildings in Britain and the United States.