Key London landmarks have been lit up in support of the London 2012 Olympic Games bid.
Big Ben will be one of several sites lit up in support of the Olympic bid
Big Ben, the Tower of London, Tate Modern, Tower Bridge, Somerset House, the Royal Festival Hall and Battersea Power Station were all illuminated.
The projections show images of athletes jumping over landmarks including the London Eye and Buckingham Palace and carry slogans backing the bid.
Wembley Stadium's arch was also lit up to support the city's bid.
Some of the projection on the landmarks carry the words "Make Britain Proud" and "Back the Bid", encouraging people to register their support by logging on to the London 2012 website.
The event, described by organisers as the "largest coordinated set of projections ever seen", is part of the effort to impress an International Olympic Committee (IOC0) delegation which is in London to assess the city's bid.
A spokesman for the bid said: "The striking illuminations will give a warm welcome to the visiting (IOC) evaluation commission, and will reinforce the combination of iconic and inspirational landmarks that would be the backdrop to a London 2012 Olympic and Paralympic Games."