10 Trinity Square

10 Trinity Square
10 Trinity Square
Location in central London
Alternative names	(Former) Port of London Authority Building
General information
Type	Commercial
Architectural style	Beaux Arts
Address	10 Trinity Square
Town or city	London, EC3
Country	England, United Kingdom
Coordinates	51°30′36″N 0°04′41″W / 51.5101°N 0.07801°W / 51.5101; -0.07801
Current tenants	Four Seasons Hotels and Resorts
Opened	1922
Client	Port of London Authority
Owner	Reignwood
Design and construction
Architect(s)	Edwin Cooper
Main contractor	John Mowlem & Co
Designations	Grade II* listed building
Website
www.fourseasons.com/tentrinity/

10 Trinity Square is a Grade II* listed building in London, United Kingdom, overlooking the River Thames at Tower Hill, in the southeastern corner of the City of London. Built in the Beaux Arts style, it is best known as the former headquarters of the Port of London Authority and is thus also sometimes referred to as the Port of London Authority Building.

Since 2017, it has been operating as the Four Seasons Hotel London at Ten Trinity Square.