In September 2010 we took part in Open House London, the capital's largest architectural festival.
Our doors at King Charles Street were open to the public on 18 and 19 September 2010, and we had 11,057 visitors.
Visitors were able to download our new audio tour to use as a guide on the day.
If you would like to share your pictures of the building with us, please join our FCO Open House flickr group so we can use them on this page.
We welcome your feedback on this event.
Please complete our questionnaire and let us know how we can improve your visit.