Addington Palace is an 18th century mansion in Addington near Croydon, south London, England. The original manor house called 'Addington Place' was built about the 16th century. The Addington estate was owned by the Leigh family until early 18th century. Sir John Leigh died without heirs and his estates went to distant relatives who eventually sold to Barlow Trecothick. He had been raised in Boston, Massachusetts, and became a merchant there; he then moved to London still trading as a merchant, and later became Lord Mayor and then an MP. He bought the estate and then became Lord Mayor of the City of London. He built a new house, designed by Robert Mylne in the Palladian style; a country mansion with single-storey wings. He died before it was completed and it was inherited by his heir James Ivers who had to take the surname Trecothick in order to inherit. James continued the work on the house, having the substantial grounds and gardens landscaped by Lancelot "Capability" Brown. Due to financial difficulties, James Trecothick had to sell the estate in 1802. The next owners were also in financial trouble and sold it by Act of Parliament in 1807. This enabled the mansion to be purchased for the Archbishops of Canterbury, since nearby Croydon Palace had become inconvenient. It was now called 'Addington Farm' by the Archbishops. It was the residence for six Archbishops of Canterbury. The archbishops made further changes and enlarged the building; work on the building was overseen by Richard Norman Shaw. The palace became the official second residence of six archbishops:
- Charles Manners-Sutton from 1805,
- William Howley from 1828,
- John Bird Sumner from 1848,
- Charles Thomas Longley from 1862,
- Archibald Campbell Tait from 1868,
- Edward White Benson from 1883.











