Welcome to PH-12C, a rare and sun-drenched sanctuary perched at the very top of one of Park Avenue South's most storied addresses. As one of only five exclusive units of its kind in the building, this penthouse offers a sophisticated blend of soaring architectural volume and a truly hidden outdoor retreat. The residence carries a unique New York pedigree, having served for several years as the home of a legendary, multi-award-winning icon of the Broadway stage-adding a layer of creative history to an already exceptional space. From the moment you enter, the scale of the home is immediate, defined by dramatic 11'4" ceilings and a southern exposure that pours natural light through four massive oversized windows. The renovation is seamless and high-end, featuring brand-new hardwood floors that lead you into a sleek, modern kitchen outfitted with premium stainless steel appliances and cabenitry. With two oversized bathrooms and an abundance of integrated storage, the layout is as functional as it is airy. The crown jewel of the residence is the private outdoor space-a completely secluded oasis tucked away from the city's hustle. Rather than competing with the skyline, this "outdoor room" is a private sanctuary surrounded by lush, curated specimen plantings. Outfitted with its own grill, it is the perfect setting for quiet al fresco dining or hosting intimate gatherings in total privacy. Life here is exceptionally convenient and secure. The building features high-security, electronically keyed elevator access via the Butterfly system and a virtual doorman, all supported by the attentive care of a live-in building manager. While there is a complimentary shared laundry room, the co-op uniquely permits you to install your own private washer and dryer within the unit, and there is ample room to do so. You'll also find the rare perk of shared common storage located right on every floor, along with a landscaped common roof garden. Beyond the front door, you are at the vibrant intersection of Gramercy and Flatiron . You are just one block north of Union Square and its world-famous Greenmarket, surrounded by the city's finest dining and shopping. With superb public transportation options just minutes from your door, this penthouse offers a peaceful, elevated lifestyle in the absolute heart of Manhattan.