London's 'Big Ben': Elizabeth Clock Tower cleaned
18 August 2014 Last updated at 11:34 BST
Cleaners have been working on the clock face on the Elizabeth Tower - which was renamed in 2012 to celebrate Queen's Diamond Jubilee.
Many people know the landmark as Big Ben - the nickname of the bell in the tower.
The clock hands were frozen at 12:00 as four cleaners scaled the clock face.