326 m (1,070 ft), The One is a tri-tower US$650 million mixed-use development project in Colombo, Sri Lanka, estimated to be the 10th largest of its kind in the world.

These freehold residences will be serviced and managed by Marriott International, the owning company of The Ritz-Carlton hotels.

Projected to be the tallest building in South Asia upon completion in 2027,[9] The One Residences tower will comprise 92 floors (reaching 376m in height), and offer residential, business and leisure facilities.

Built across 4.3 acres (1.7 ha) of Colombo Fort (Sri Lanka's business center) development is less than ten minutes away from Colombo Financial City (a part of the upcoming Colombo Port City Project), about 2 minutes from the World Trade Centre Towers, and five minutes away from the Galle Face Green esplanade.

[10] The development includes a transformation of Colombo's historic Transworks Square, a 200-year-old heritage site, which will be refurbished as a mall featuring designer brands.