NOTES: Construction on Lancaster House, the last great Georgian London mansion, began in 1825 for the Duke of York and Albany, the second son of King George III and was initially known as York House. The exterior was designed by Benjamin Dean Wyatt and was only a shell at the Duke's death in 1827. The house was purchased by the Marquess of Stafford (later 1st Duke of Sutherland) in 1828 who commissioned Barry to make extensive alterations, mainly for the interior.
NOTES: This was the Royal Horticultural Society's second hall, the first being an Edwardian construction of 1904 on Vincent Square, known as Old Hall or Lindley Hall. It thus became known on its completion in 1928 as New Hall. It is also known as the Lawrence Hall.