The commercial hub of Manchester or Cottonopolis was the Exchange, of which there were four, the first was in the market place in 1727 and it was re-built three times. Thomas Harrison built the second in the Greek Revival style between 1806 and 1809 and it was enlarged between 1847 and 1849. Queen Victoria granted it the title the Manchester Royal Exchange in 1851. The third exchange in the Classical style by Mills and Murgatroyd, opened in 1874 and was lavishly re-built Bradshaw Gass & Hope between 1914 and 1921. It had the largest trading room in the world but closed for cotton trading in 1968 and now is a theatre.