President Calvin Coolidge used his authority under the Antiquities Act to declare the statue a national monument in 1924.[1] In 1937, by proclamation 2250, President Franklin D. Roosevelt expanded the monument to include all of Bedloe's Island, and in 1956, an act of Congress officially renamed it Liberty Island.[6] Ellis Island was made part of the Statue of Liberty National Monument by proclamation of President Lyndon Johnson in 1965.[2] The United States historic district, a single listing on the U.S. National Register of Historic Places, was designated in 1966.[7]