<P> The tower was designed by Augustus Pugin in a neo-gothic style . When completed in 1859 , it was , says horologist Ian Westworth , `` the prince of timekeepers : the biggest , most accurate four - faced striking and chiming clock in the world '' . It stands 315 feet ( 96 m ) tall , and the climb from ground level to the belfry is 334 steps . Its base is square , measuring 39 feet ( 12 m ) on each side . Dials of the clock are 23 feet ( 7.0 m ) in diameter . On 31 May 2009 , celebrations were held to mark the tower 's 150th anniversary . </P>
<P> The tower was designed by Augustus Pugin in a neo-gothic style . When completed in 1859 , it was , says horologist Ian Westworth , `` the prince of timekeepers : the biggest , most accurate four - faced striking and chiming clock in the world '' . It stands 315 feet ( 96 m ) tall , and the climb from ground level to the belfry is 334 steps . Its base is square , measuring 39 feet ( 12 m ) on each side . Dials of the clock are 23 feet ( 7.0 m ) in diameter . On 31 May 2009 , celebrations were held to mark the tower 's 150th anniversary . </P>
when was the clock tower in london built
when was the clock tower in london built
1859
1859