The building was designed by architect
Richard Seifert and constructed from 1967 to 1969 by
Grand Metropolitan Hotels as the
Britannia Hotel. It has a classical red-brick facade facing Grosvenor Square, and a modern concrete, brick and glass facade facing Adam's Row. The hotel was renamed the
Britannia Inter-Continental London in 1981, after Grand Metropolitan acquired
Inter-Continental Hotels. The hotel was bought by
Millennium & Copthorne Hotels on 7 October 1996 and renamed the
Millennium Britannia Hotel. It was renovated in 2000 and renamed the
Millennium Hotel London Mayfair. The hotel's Pine Bar was the site of the
poisoning of Alexander Litvinenko in 2006. The hotel was renovated again beginning in November 2017, at an estimated cost of £50 million. It closed in July 2018 to complete the renovations and reopened on 9 September 2019 as
The Biltmore Mayfair, LXR Hotels & Resorts ==References==