Chatham House Chatham House The Royal Institute of International Affairs, commonly known as Chatham House, is a not-for-profit and non-governmental organisation based in London whose mission is to analyse and promote the understanding of major international issues and current affairs. It is the originator of the Chatham House Rule and takes its name from the building where it is based, a Grade I listed 18th-century house in St James's Square, designed in part by Henry Flitcroft and occupied by three British prime ministers, including William Pitt, 1st Earl of Chatham. In the University of Pennsylvania’s rankings (announced in January 2017) for their
John Pitt, 2nd Earl of Chatham He continued to hold various ceremonial positions: he had been appointed Lieutenant Governor of Jersey and High Steward of Colchester in 1807, and in 1820 succeeded the Duke of Kent as Governor of Gibraltar. He died at his house in Charles Street, London, on 24 September 1835, aged 78. Chatham married The Hon. Mary Elizabeth Townshend, daughter of the 1st Baron Sydney, on 10 July 1783. The couple had no children. Lady Chatham died on 21 May 1821. Chatham did not remarry and, following his death, the Earldom of Chatham became extinct. John Pitt, 2nd Earl of Chatham General John