Rosemary was the oldest daughter of Joseph and Rose Kennedy. Although she lived to age 86, she underwent a lobotomy at the age of 23 that left her incapacitated and institutionalized in a Wisconsin facility. The family long maintained she was born mentally retarded, but others argue that she was not, evidenced by her careful diaries in her youth and traveling alone-and that her father had her lobotomized due to inappropriate behavior. Drs refused the operation, but eventually Joe found a Dr.