Ralph Walker's limestone-clad 1 Wall Street is an Art Deco beauty inside and out. The 50-story building was constructed during the same years as the Empire State and Chrysler buildings, and it was originally occupied by the Irving Trust Company. It features setbacks characteristic of Art Deco, as well as vertical designs etched along the faceted facade, but the interiors are what truly make 1 Wall Street special. The building's soaring double-height lobby on Wall Street, the bank's original reception room, is a stunning space designed by Hildreth Meiere. Known as the Red Room, it's covered with a mosaic of red, gold, and orange tiles that were made in Berlin. On the 49th floor, an observation room occupies "a gaspingly high space," as the Times says, with vaulted ceilings covered with shells from the Philippines. The interiors, however, are not protected as landmarks, so there's a chance that developer Harry Macklowe could destroy them when he converts the building to condos and rentals, but if the man has any sense at all, he won't.