Which president served four terms before dying in office?

Franklin Roosevelt is the only president in U.S. history to have served four terms in office. He was first elected in 1932 and went on to win three more consecutive elections, serving from March 4, 1933, until his death on April 12, 1945. Roosevelt's presidency was marked by significant events such as the Great Depression and World War II, and he implemented numerous programs aimed at economic recovery and social welfare through his New Deal policies.

His unmatched tenure directly influenced the ratification of the 22nd Amendment in 1951, which established a two-term limit for future presidents, ensuring that no one could hold the office for an extended period like Roosevelt. This historical context makes his four terms particularly noteworthy and relevant to discussions on presidential powers and governance in the United States.