Estherwood is a late 19th-century mansion located on the campus of The Masters School in Dobbs Ferry, New York, United States. It was the home of industrial tycoon James Jennings McComb, who supported Masters financially in its early years when his daughters attended. The house's octagonal library was the first section built. It had been attached to McComb's previous home, but he had felt it deserved a house more in keeping with its style and so had architect Albert Buchman design Estherwood built around it. The interior features lavish decoration and detail, with generous use of marble and gold leaf. As the only significant châteauesque building in Westchester County, it was added to the National Register of Historic Places (NRHP) in 1979 as Estherwood and Carriage House. Buildings The Estherwood NRHP listing recognizes both the mansion and its carriage house as contributing resources. Both are located on a 10-acre (4 ha) parcel just east of the main Masters buildings. Mansion exterior The house is three and a half stories high, with a varying number of bays on each of its sides. It is faced in white pressed brick with granite trim and terra-cotta detailing. Its roof is black and red ceramic tile, with copper cresting and stone filials, from which four red brick chimneys rise. A copper-clad cupola caps the east facade's tower. The porte-cochère on the west facade, the house's main entrance, is supported by granite piers and Doric order columns. It has a Guastavino tile ceiling to match the one on the veranda that encircles the rest of the house. The irregular fenestration includes fifteen dormer windows and a second-story oriel window. Mansion interior From the entrance, there is a vestibule with mosaic flooring, marble baseboards, classical molding and bronze light fixtures. It leads to 65-foot-long (20 m) Great Hall that rises two stories to a coffered ceiling and skylights. A divided staircase of pink marble rises to a gallery that overlooks the hall. The balcony is supported by Ionic columns on high plinths. The hall also features a green marble fireplace with limestone trim. The oak parquet floor has a carved Greek key-patterned border repeated on the underside of the gallery. Six rooms are located off the Great Hall, also with lavish decoration. The dining room has dark oak walls with carved Northern European motifs such as boars' and rams' heads, broken by copper and bronze medieval