Renowned architect Robert A.M. Stern envisioned 20 East End Avenue as one of his signature buildings a bespoke property emanating luxury and elegance. High atop the building, Penthouse B is a sweeping 5 bedroom, 5.5 bathroom residence with an additional library and family room, formal dining room with terrace, and living room. Offering 360 degree views of Manhattan and the East River, Penthouse B showcases timeless elegance in its grand, sweeping floor plan. Spanning approximately 6,292 interior square feet, and 328 exterior square feet, this palatial residence features up to 11 foot ceiling heights, 3 interior wood burning fireplaces, expansive casement windows, custom moldings, and solid Appalachian oak herringbone flooring. The living room enjoys expansive East River views south to the 59th Street Bridge. The masterfully placed formal dining room offers sparkling views of the city skyline South and West with direct access to a large terrace. The chefs kitchen boasts custom shaker inspired millwork cabinetry, Calcutta Monarch marble countertops, Lefroy Brooks hardware and full Gaggenau appliance package. The stunning master bedroom suite offers views North and East while the master bathroom is fully clad in white Caldia Classico marble. This spectacular residence offers a rare opportunity to live in one of the finest Penthouses on the Upper East Side.