Theodore Roosevelt signs the Antiquities Act into law, authorizing the President to restrict the use of certain parcels of public land with historical or conservation value.

Theodore Roosevelt Jr. was the 26th president of the United States, serving from 1901 to 1909. Previously serving for six months as vice president under William McKinley, Roosevelt became president after McKinley's assassination in 1901. He was 42 years old upon his first inauguration, making him the youngest person to hold the office.