The Robert A.M. Stern-designed 200 East 83rd Street brings a touch of elegance inspired by prewar architecture to its Upper East Side corner. Oversized arched windows flood the apartments with natural light, and that mindset extends to the design of the building’s common spaces. These include a 70-foot indoor pool with vaulted ceilings, double-height arched windows, and access to a loggia with expansive views of Central Park and the Manhattan skyline.