The remainder of Duke's estate, estimated at approximately $100 million (equivalent to $ in ), went to his twelve-year-old daughter, Doris, making her "the richest girl in the world". In 1927, Doris sued her mother for control of the Duke Farms estate and won. Associating Duke Farms with fond memories of her father, Doris Duke made few major changes to the property other than the adaptation of her father's Conservatory to create Display Gardens in his honor. These gardens showcased her father's extensive sculpture collection and were open to the public from 1964 until closed by her foundation trustees in May 2008.