1939 - July 2 – Theodore Roosevelt's head is dedicated at Mount Rushmore.

On July 2, 1939, a significant event took place at Mount Rushmore in South Dakota: the dedication of Theodore Roosevelt's head. This event marked the completion of the massive sculptural project initiated by artist Gutzon Borglum in 1927. Mount Rushmore itself had been chosen as the site due to its solid granite face, which was suitable for carving and had already gained some local significance.

The dedication ceremony was a grand affair, attended by dignitaries and officials, including Roosevelt's son, Theodore Roosevelt Jr. The addition of Theodore Roosevelt's likeness completed the quartet of presidents depicted on Mount Rushmore, alongside George Washington, Thomas Jefferson, and Abraham Lincoln. Roosevelt was selected for his contributions to conservation and his significant impact on American politics and society during his presidency (1901-1909).