/ About
Ten Trinity Square was built in 1922 as the headquarters of the Port of London Authority, Edwin Cooper's Portland stone statement of a city that ran the world's shipping. Four Seasons took it on in 2017. The building's set pieces survived the conversion intact: a domed rotunda at the centre of the ground floor, now the Rotunda Bar & Lounge, where fluted columns rise to an Art Deco glazed dome above an inlaid marble floor.
The second floor holds the event rooms. The UN Ballroom is the one with the history — the inaugural reception of the United Nations General Assembly was held here in 1946 — and it has been restored to its walnut panelling, Corinthian columns and crystal chandeliers. Next to it, Merchants Hall sits under its own dome, and a 96-square-metre pre-function space links the two, which is how the hotel reaches its published ceiling of 300 for a single event. Two penthouses on the seventh floor open onto terraces facing Tower Bridge and the Tower of London.
Dining is in-house across three rooms: Mei Ume for Chinese and Japanese cooking, the steak-led Cooper's Cut, and the Rotunda for cocktails and afternoon tea. All three take private hire, and Cooper's Cut can be bought out whole. The events team handles the building's grander rooms directly.
/ Rooms Available
UN Ballroom
PrivateThe room where the inaugural reception of the United Nations General Assembly was held in 1946, restored to its walnut panelling, Corinthian columns and crystal chandeliers. 203 square metres on the second floor, with natural light on one side.
Rotunda Bar & Lounge
Exclusive HireThe hotel's central hall, directly off the entrance: fluted columns rising to an Art Deco glazed dome, an inlaid marble floor and a bar set into the far side. Taken privately for standing receptions.
The Thames Penthouse
Exclusive Hire613 square metres on the seventh floor, opening onto a terrace that faces Tower Bridge and the Tower of London. The largest space in the building by floor area, used for receptions and seated dinners.
Merchants Hall
PrivateA circular room under its own dome on the second floor, 138 square metres, next door to the UN Ballroom and taken with it for larger events.
Mei Ume
Exclusive HireChinese and Japanese cooking in a panelled room off the ground floor, taken privately for dinners and receptions.
Cooper's Cut
Exclusive HireThe hotel's steakhouse, named for Edwin Cooper, the architect of the building. Sixty covers plus a private dining room, and available as a whole-restaurant buyout for seated dinners or standing receptions.
UN Reception
PrivateThe 96-square-metre pre-function space serving the UN Ballroom and Merchants Hall on the second floor. Taken with the ballroom, it is what carries a single event to the hotel's published maximum of 300.
The City Penthouse
Exclusive Hire283 square metres on the seventh floor, arranged as a drawing room around a fireplace, with its own terrace.
The Gallery
Semi PrivateA 72-square-metre gallery on the first floor, used for drinks receptions and as a break-out from the meeting rooms alongside it.
Serica
PrivateA 36-square-metre first-floor meeting room, divisible into two halves (Serica I and Serica II).
Cooper's Cut Private Dining Room
PrivateThe steakhouse's twelve-seat private dining room, off the main restaurant floor.
The Chairman's Room at Mei Ume
PrivateMei Ume's private dining room, seating twelve around a single central table.
Ariel
PrivateA 25-square-metre first-floor meeting room seating eight.
Challenger
PrivateA 25-square-metre first-floor meeting room seating eight.
/ Perfect For
/ Features
Catering
- – In-House Luxury Dining
- – Private Bar
- – Bespoke Menus
- – Canape Service
Licensing
- – Full Alcohol Licence
Venue Specs
- – Dedicated Events Team
- – Outdoor Terrace
/ Getting Here
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