1632-1723. English architect, designer of St Paul's Cathedral, London, built 1675-1710; many London churches including St Bride's, Fleet Street, and St Mary-le-Bow, Cheapside; the Royal Exchange; Marlborough House; and the Sheldonian Theatre, Oxford. Wren studied mathematics, and in 1660 became a professor of astronomy at Oxford University. His opportunity as an architect came after the Great Fire of London 1666. He prepared a plan for rebuilding the city, but it was not adopted. Instead, Wren was commissioned to rebuild 51 City churches and St Paul's Cathedral. The west towers of Westminster Abbey, often attributed to him, were the design of his pupil Hawksmoor.