The Old War Office (OWO) of Britain's World War II era prime minister Winston Churchill opened its doors as a brand-new luxury hotel in London with a glittering launch event, complete with surprise musical performances by musicians Lord Andrew Lloyd Webber and Andrea Bocelli.
Princess Anne - the Princess Royal, the sister of King Charles III, officially unveiled the plaque for The OWO after a tour of the hotel with Hinduja Group co-chairman GP Hinduja on Tuesday evening.
British Prime Minister Rishi Sunak also made a quick stopover, along with parliamentarians, entrepreneurs, hoteliers and stars of film and television.
The Indian-origin Hinduja Group conglomerate and the UK's richest family had acquired the landmark on Whitehall, opposite Downing Street, over eight years ago and tied up with Raffles Hotels to transform the building into an extravagant hub complete with luxury residences, restaurants and spas.
As part of the renovation with the help of hundreds of artisans, the historic interior elements have been restored, including delicate hand-laid mosaic floors, oak panelling, glittering chandeliers, and a magnificent marble staircase.
The most historically significant areas of the building include the Heritage Suites, former offices of the influential political and military leaders associated with its history.
The transformed OWO also houses 85 Residences by Raffles as part of the building's reimagining as a new culinary district for London, complete with nine new restaurants and three bars, including a rooftop with panoramic views of Buckingham Palace.