International Olympic chiefs are in London to discuss lessons that can be learned from the Beijing Games.
Dozens of VIPs, led by International Olympic Committee (IOC) President Jacques Rogge, are taking part in the four-day Beijing debrief.
Officials from the Beijing 2008 Organising Committee (Bocog) will share their experiences with the London 2012 Organising Committee and other Games organisers from Vancouver, Sochi and the 2016 candidate cities.
Venues, including their design, cost and future use, may be a hot topic as London 2012 seeks to make cost-savings on its temporary venues. A future tenant for London's showpiece Olympic Stadium also has yet to be finalised.
There has been praise for Beijing's spectacular arenas such as the Bird's Nest and Water Cube.
London 2012 sent more than 100 officials to Beijing to try and pick up tips on how to host an Olympics.
Lord Coe, the London 2012 chairman, said the "number one lesson" from Beijing was that the "most extraordinary" medal-winning performances of both Team GB and ParalympicsGB is something that should be built upon in the next four years. He also said Beijing had a "real eye for detail and nothing was left to chance".
Beijing was also a fully-integrated Games and the simplicity of planning between the Olympics and the Paralympics which saw both events given equal importance, Lord Coe noted.
Another Beijing approach which London organisers hope to copy is the way the athletes were treated, including the provision of the exceptional Olympic Village.
A discussion among panellists including Lord Coe, BBC Deputy Director Mark Byford and double Olympic champ Dame Kelly Holmes is to follow.