This three-bedroom TriBeCa duplex, about 2,170 square feet, has three, north-facing arched windows in the living room and one facing east in the open kitchen (all are custom-made, double-glazed glass) ...

Their formal dining room had a large, arched window that flooded the space — all the way to the top of its 12-foot ceiling — with light. It was a cheerful room that just made you feel good ...