Constructed by Henry Overholser and referred to as the "Father of Oklahoma City," the Overholser Mansion is the first mansion built in Oklahoma City. David Jay Perry, the son-in-law of the Overholsers, sold the mansion and all of its belongings to the Oklahoma Historical Society in April 1972. Preservation Oklahoma has been the caretaker of this Oklahoma City treasure since 2003.

Preservation Oklahoma provides guided tours so visitors can learn the stories the Overholser family, as well as their servants and neighbors. In order to preserve the mansion for future generations, Preservation Oklahoma has overseen an extensive restoration of its exterior, raising nearly $750,000 through local companies, foundations, and citizens. Since 2008, the building's original windows, roof, and several chimneys, as well as the sandstone exterior and balustrades, have been repaired.