The Grade I listed building is managed by the FCDO was Commissioned in 1825 by the ‘grand old’ Duke of York, York House – as it was then known – was a hub of social and political life throughout the 19th century.

London Stone Conservation carried out waterproofing and resurfacing with white marble with black inset flooring to the Porte Cochere (Music Room Balcony).

Lancaster House, built as a town mansion built around 1820, was initially designed by Sir Robert Smirke and later modified by Benjamin Dean Wyatt and Philip Wyatt, with contributions from Charles Barry. Constructed of Bath stone with a slate roof, it features giant Corinthian porticoes on the north, south, and Green Park fronts. The mansion has two main storeys, a basement, and an attic storey, with distinctive elements such as rusticated arcaded porte-cochere, architraved sash windows, and a continuous entablature below the attic storey.

The interior is opulent, featuring a vast marble-lined stair compartment with a central flight and a gallery colonnaded on the east and west sides. Rich white and gold decorations on red and green walls adorn the state rooms, inspired by Baroque-Rococo style reminiscent of Versailles. Notable interior highlights include the great tripartite gallery and the north anteroom, showcasing artworks by Guercino and Veronese.