One Dalton rises at the juncture of two Boston neighborhoods: the Back Bay, with its tree-lined streets of nineteenth-century townhouses, and the western end of the city’s High Spine, comprising the largest-scale complex in Boston. This fascinating juxtaposition of scales presented one of the major challenges of the project. With careful consideration of siting, cascading scales, and materiality, One Dalton demonstrates how a tall building, together with the open spaces it frames, can respond creatively to the need for growth while showing appropriate respect for a historic urban setting.