The Lucy Drexel Dahlgren House is a historic home located at 15 East 96th Street between Fifth and Madison Avenues in Manhattan, New York City.

A private house used at one time as a convent, it was built in 1915–16 for Lucy Wharton Drexel Dahlgren.

[10][12] On the second and third stories, the rusticated blocks are interspersed with windows surrounded by recessed limestone panels, which give the appearance of pilasters rising to the attic.

[14] The lowest part of the facade includes a 2-foot-high (0.61 m) smooth-granite water table, with granite posts flanking each bay.

[15] The westernmost segmental arch contains a set of double wooden doors with moldings and panels.

[9] Instead, the western side of the house's ground floor includes a porte-cochère, outdoor courtyard, and garage.

Its pavement is composed of pale orange bricks in a herringbone pattern, flanked by granite steps on both sides.

On the right wall is a granite step leading up to the house's main entrance, which is through a set of glass double doors.

This pavilion contains French doors at the first and second stories, while the upper floors have casement with transom windows.

A brick wall measuring about 7 feet (2.1 m) tall runs along the west or left side of the courtyard.

The main hall is oriented from south to north and is made of similar materials as the rectangular vestibule, although the ceiling has an inset panel.

[29] To the south of the first-floor hall are paneled double doors leading to a rectangular reception room,[29] which faces 96th Street.

The main hall's northern end is an elevator lobby with a window facing west, an elevator door facing east, and a double door leading to an octagonal study with similar decorations to the reception room.

It was restored in the late 1990s, when it was believed to be the last player organ in New York City, and placed in storage in the 2000s.

[10][26] The dining room has terrazzo floors with marble borders, in addition to niches with wine coolers.

The master bedroom also has a concrete slab floor; a wall with a dado, fluted pilasters, and panels; concealed lighting; and two chandeliers.

[33] The octagonal library has concrete floors; bookcases with windows on the west and southwest walls; an entrance with Corinthian columns to the south; a fireplace mantel with sculptured ornament to the north; and a niche to the east.

[19] As part of a 1988 renovation, a chapel at the front of the fifth floor became a solarium, the formerly separate rooms were combined into a single exhibition gallery space, and two bathrooms were added.

[37] While in Paris, Lucy Dahlgren met the architect Ogden Codman Jr., who persuaded her to buy a site at 15 West 96th Street near to his own house.

[36][40] That June, Codman filed plans for "a high-class residence" on the site, which was to cost $75,000 and rise six stories.

[45][46] He mainly lived in a 35-room mansion on 19 acres (7.7 ha) of land that he owned in Roslyn Harbor, New York, and used the 96th Street house as an urban pied-à-terre.

[33] In 1945, on his retirement, Cartier sold the house to the St. Francis de Sales Roman Catholic Church.

[11][48] Cartier, who had sold off his Roslyn Harbor mansion the previous year, relocated to Geneva in upstate New York with his wife.

[26] Singer began restoring the house with the intention of creating a museum of late 19th- and early 20th-century furniture and objets d'art.

[19] The house was designated a New York City Landmark in 1984,[3] and was added to the National Register of Historic Places in 1989.