National Historic Preservation Act

…register was established by the National Historic Preservation Act (NHPA) of 1966, and it is administered by the National Park Service.

…and, after passage of the National Historic Preservation Act of 1966, it was again so designated in 1971. In 2019 UNESCO designated the residence, along with seven other Frank Lloyd Wright buildings, a World Heritage site. The house is operated by the Frank Lloyd Wright Preservation Trust, and it underwent…