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 It was around this time that he earned his nickname of 'the late Lord Chatham' due to his unpunctuality. Chatham nevertheless hung onto his office until the following December, when Pitt finally responded to pressure and moved his brother to the less responsible post of Lord Privy Seal. Two years later Chatham was promoted to Lord President of the Council. Here he stayed, remaining in office after Pitt's resignation under Henry Addington, until a cabinet reshuffle in June 1801 moved him to the post of Master-General of the Ordnance. He continued in this post until May 1810, with only a