Classic elegance defines this spacious and bright 4-bedroom/3 bath duplex home.  With open city views and spectacular natural light, it is perfectly positioned mid-block, on a quiet tree-lined street.   Recently renovated, this home combines a pre-war esthetic with a crisp, refined sense of style. One enters into a spacious foyer that opens on to an expansive, well-proportioned loft living/dining area. A windowed open chef's kitchen with a large island, comfortably seating four, grounds the space. Custom cabinetry, Carrara marble counters, top of the line appliances, and a butlers pantry complete this kitchen.  Off the living area is a large bedroom currently being used as a den/family room, as well as a full bathroom,   A central staircase leads to the lower level, bedroom "wing".  The exquisite oversized master suite has a spectacular custom closet/dressing room and a stunning, newly renovated marble bath with double vanities and a large walk-in shower.  The second and third bedrooms are both amply sized and share the second large marble bath, also with double vanities. The washer/dryer, that vents out, is conveniently located on this floor as well as the wine refrigerator and temperature-controlled wine storage unit.  High-end finishes can be found throughout along with an abundance of storage. Beautiful classic architectural elements include high-beamed ceilings, detailed moldings, and hardwood floors. Modern comforts include a built-in sound system on the top floor and through-wall air conditioning and heating in every room.   215 West 78th Street is a gracious pre-war co-op with a tasteful, welcoming marble lobby. Amenities include a common garden, delivery package room, free storage space, a bike room and a laundry room.  Pets welcome.