With soaring ceilings up to 13 feet, 4 East 66th Street (845 Fifth Avenue) is one of Lenox Hill’s most coveted addresses. Designed by James E.R. Carpenter and built in 1920, this exclusive 12-story limestone building offers just 16 grand residences. Interiors feature fireplaces, elegant entry galleries, and refined architectural details. Located steps from Central Park and top-tier dining and shopping, the pet-friendly co-op offers full-time doorman service for a discreet and luxurious lifestyle.