Anna Eleanor Roosevelt was an American political figure, diplomat, and activist. She was the first lady of the United States from 1933 to 1945, during her husband President Franklin D. Roosevelt's four terms in office, making her the longest-serving first lady of the United States. Through her travels, public engagement, and advocacy, she largely redefined the role of First Lady. Roosevelt then served as a United States Delegate to the United Nations General Assembly from 1945 to 1952, and in 1948 she was given a standing ovation by the assembly upon their adoption of the Universal Declaration of Human Rights. President Harry S. Truman later called her the "First Lady of the World" in tribute to her human rights achievements.