Mandarin Oriental Mayfair opened this week in London’s historic Hanover Square.

The boutique sister property to Mandarin Oriental Hyde Park features 50 guestrooms and suites, 77 private residences, award-winning Chef Akira Back’s London restaurant debut, two bars, and a spa.

Designed by internationally-renowned Rogers Stirk Harbour + Partners (RSHP), Mandarin Oriental Mayfair is the first new build in Mayfair for over a decade. RSHP has created a unique Vierendeel structured building – one of the first in the United Kingdom – that provides wide internal space and a contemporary townscape façade, clad with burnt brick “baquettes” (the longest in the United Kingdom), inspired by the Georgian terraces that surround the hotel.

The property’s rooms, suites and private residences were crafted by Studio Indigo, who blended the hospitality company’s Asian heritage with locally-inspired elements.

Every guestroom has been imagined as a jewelry box. Design elements include a palette that includes emerald green, maroon and turquoise, and the use of fine woods, marbles, soft fabrics and carpets, bespoke lighting and furniture complemented by metallic finishes in brass, bronze and gold. House of de Gournay hand-painted silk wallpaper featuring a flowering magnolia design is a focal point of the design and a nod to the trees found in Hanover Square.

The best of East meets West can also be found in Mandarin Oriental Mayfair’s public spaces – the reception, atrium, Akira Back restaurant, ABar Lounge, 14-seater chef’s table Dosa, private dining rooms and spa – all by Tokyo-based design agency Curiosity. Later this year, the ABar Rooftop will open, delivering panoramic views over the London skyline.

The Spa at Mandarin Oriental Mayfair brings some firsts to the UK wellness scene. These include new to London binaural biohacking treatments, offering stress release, mindfulness, awaken and power nap as quick-fix 22-minute experiences.

The spa also offers a 25-meter swimming pool, sauna, vitality pools and experience showers, a state-of-the-art gym, personal training, Reformer Pilates, nutritional consultations, physiotherapy, and NormaTec massage technology, which is used be elite athletes to improve recovery and performance.

The overall project, comprising Mandarin Oriental Mayfair and the 77 residences at Mandarin Oriental Mayfair, is developed and owned by Clivedale London, an independent, Mayfair-based developer.