The Overholser Mansion is a historic house museum in Oklahoma City's Heritage Hills neighborhood, built in 1903.

[2] Overholser bought the land for the purpose of building a residence in 1901 and, when built, the mansion was located away from the city center and surrounded by farmland.

After Henry Ione's death in 1959, the property was transferred to her husband David Perry, who then sold the mansion and its furnishings to the Oklahoma Chapter of American Institute of Architects and Historical Preservation Inc.

[4] The 11,700 square-foot Châteauesque-styled mansion was designed by London-trained architect W. S. Matthews and built at a cost of $38,000.

At the southeast corner is a three-story octagonal tower capped with an 8-sided pyramidal roof with a finial.

Interior walls and ceilings were hand-painted and are illuminated by light fixtures imported from Italy.

[5] A carriage house accompanies the mansion to the west and measures an additional 4,000 square feet (370 m2).

The kitchen connects to the main halls through another doorway to the east, leading to the underside of the back stairs, where the entrance to the basement is located.

The second and larger stair landing has a small sitting area that occupies part of the tower.

Also at the top of the staircase are two large stained-glass windows, each depicting Greek women playing an instrument, one a violin and the other a tambourine.

Connected to the Perry Bedroom is another bathroom to the west, which then leads into the second floor sitting room.