Upon its completion in 1931, the new Waldorf Astoria became both the tallest and the largest hotel in the world. At 625 feet, and with 1.68 million sq. ft. in floor area, the Waldorf occupied an entire city block between Lexington and Park Avenue and offered more than 2,000 rooms.

Designed by architect Lloyd Morgan of the firm Schultze and Weaver, the new Waldorf Astoria was a mountain of construction, with its limestone base matched above with gray bricks, custom-made for the hotel and named “Waldorf Gray.” The wide base was topped by two towers which were filled mostly with private residences. Ornamental spires with a streamlined classicism gave the hotel a modernist “Art Deco” character.

Dubbed “New York’s Unofficial Palace,” the Waldorf Astoria’s luxurious suites have been home to many high-profile residents, including William Randolph Hearst Jr. and the Duke and Duchess of Windsor. Every president since Herbert Hoover has stayed in the hotel’s Presidential Suite, and the Waldorf is the official residence of the United States’ UN Ambassador.