Chatham House, formally known as The Royal Institute of International Affairs, is a non-profit, non-governmental organization based in London whose mission is to analyse and promote the understanding of major international issues and current affairs. It is regarded as one of the world's leading organizations in this area. It takes its name from its premises, a grade I listed 18th century house in St. James's Square designed in part by Henry Flitcroft and thrice occupied by British Prime Ministers including William Pitt, 1st Earl of Chatham. The website is [1] and the Wikipedia page is [2].