The Grand Connaught Rooms, Nos. 61-63 Great Queen Street, is designated at Grade II* for the following principal reasons: * Architectural: for the façade of the former Freemasons' Tavern, a good example of a mid-C19 Italianate commercial frontage, and for the surviving section of Cockerell's elaborate Freemasons' Hall with figures by a notable sculptor. * Interiors: a unique ensemble of spaces, comprising elements of the 1774 Tavern, a series of ornate rooms dating from 1863-64 and 1905-10, most notably the Great Hall, and a virtually complete suite of 1933-36 interiors. * Historic: the successor of the original Freemasons' Tavern, the site of Britain's first Grand Lodge, and for the numerous events that took place there including the founding of the Anti-Slavery Society and the Football Association. * Group value: with the adjoining Masonic Hall, listed Grade II*.

See https://historicengland.org.uk/listing/the-list/list-entry/1393970 for more details.