ROOSEVELT

She served as the First Lady of the United States from March 4th, 1933, to April 12th, 1945, during her husband President Franklin D. Roosevelt's four terms in office, making her the longest-serving First Lady of the United States. She then served as United States Delegate to the United Nations General Assembly from 1945 to 1952. President Harry S. Truman later called her the First Lady of the World in tribute to her human rights achievements.