THE ONLY MANSION ON FIFTH AVENUE1009 Fifth Avenue is the only mansion ever to be available directly on Fifth Avenue and it is now for sale for the second time since it was built 108 years ago.Not only does The Duke Semans Mansion have 27 feet of width directly on Fifth Avenue but it is also at the corner of East 82 Street giving 100' of facade with 8 huge windows along East 82 Street. While every other large house on the market is on a side street and therefore facing north and south The Duke Semans Mansion is the only one that faces west and north with additional East and South views on the upper floors bathing the interior in light at all times of the day. It can either be a major residence or be developed as a luxury three unit building with separate entrances for each space.A MANHATTAN LANDMARKDeemed the 'most important example of Beaux-Arts residential architecture in the city' by an early critic the Duke-Semans Mansion was officially landmarked in 1974. The interior spans more than 19 500 square feet on eight levels. Tall windows and exposures in all four directions on the upper floors bathe the rooms in sunlight and afford outstanding views. Decorative moldings and woodwork parquet floors with beautiful inlays and handsome paneling are among the remaining original details. In its present configuration the mansion could be a magnificent eight-level residence a five-level residence with a penthouse duplex on the sixth and seventh levels and a doctor's office on the basement level. Here is that once in a lifetime opportunity to acquire the only mansion on Fifth Avenue in New York.LEVEL ONEThe mansion's three entrances are located on the first level. A gothic-inspired marquee designed by C. P. H. Gilbert shelters the main entrance. The main foyer is graced by marble flooring ornate moldings and an original powder room. One separate entrance leads to a former penthouse duplex and a third entrance leads to the elevator to the doctor's office below. An original powder room and media room with floor-to-ceiling wood paneling and an original fireplace are situated in the west portion of the first level. This corner room has three full windows overlooking Fifth Avenue and two beautiful additional windows facing north. Also here are a windowed concierge and security room a staff suite with a full bath and an additional windowed office suite. LEVEL TWOThe traditional parlor level encompasses grand formal living and dining rooms connected by an expansive landing a kitchen with an amazing solarium and a pantry with a staff bath-all with windows. The corner living room features three floor-to-ceiling windows overlooking Fifth Avenue as well as two north-facing windows flooding its grand dimensions in magnificent sunlight.LEVEL THREEOn the mansion's third level is the master bedroom suite which includes two full baths and a large walk-in dressing area. The west side of the floor contains a formal library or music room with views of the Metropolitan Museum of Art.LEVELS FOUR & FIVETwo grand-scale bedrooms-all suffused with natural light-are found on the mansion's fourth level. The mansion's bright fifth level encompasses a large bedroom with a windowed bath a large sitting room-bedroom with a fireplace a small elegant terrace. This level also features an additional guest suite.LEVELS SIX AND SEVENThese levels can be accessed via a private elevator. A master suite with two bathrooms is located on the top level. The living areas two additional bedrooms and baths and a powder room are on the lower level. Glorious sunlight pours in through the rooftop skylight. A private staircase leads from the top floor to a pair of planked terraces that provide vistas of Fifth Avenue and Central Park. This is a residence for the ages a home whose history-filled past is a wonderful prologue for the next era in its remarkable