The Great HallFamily of William Marquis of LothianThe major addition to the house in 1962-3 was this large hall which was conceived of as a general place of assembly and focus for the house, and as a gallery for the display of the larger family pictures from Newbattle Abbey. More recently concerts have held here by kind permission of the family.

It is entirely a Schomberg Scott design with a Scottish wagon ceiling (inspired by Falkland Palace), the gallery and stairs having a wrought iron balustrade made in Edinburgh. The floor is of African mahogany, a hardwood much used by architects in the 1960s.

Charles IA full-length equestrian portrait of Charles I by Van Dyck dominates the east wall and is a contemporary version of that painted for the gallery at St. James’s, which is now at Buckingham Palace, and was probably a gift from the king to his old tutor Robert 1st Earl of Ancram. Beneath it, and equally striking, is a vast silver wine cooler by the Huguenot silversmith Philip Rollos, engraved with the arms of Queen Anne and stamped 1705. This formed part of the gift from the Russian Empress Catherine the Great to the Earl of Buckinghamshire, who was rumoured to be her lover, while ambassador to the Russian Court in St. Petersburg.
The remaining paintings within the Great Hall are family portraits.