Rising 61 storeys above Boston’s Back Bay neighbourhood, Four Seasons Private Residences One Dalton Street, Boston, is the tallest residential tower – and third tallest building – in the city. Designed by Henry N. Cobb of Pei Cobb Freed & Partners, one of the world’s most distinguished architects, in partnership with CambridgeSeven, the curved, all-glass structure sets itself apart as an architectural masterpiece without precedent.