Head of state 1911 by her grandson, King George V; or the monument, placed in front of the Victoria Memorial Hall, Kolkata (Calcutta) (1921), commemorating Queen Victoria's reign as Empress of India from 1876. Another, twentieth century, example is the Mount Rushmore National Memorial, a group sculpture constructed (1927–1941) on a conspicuous skyline in the Black Hills of South Dakota (40th state of the Union, 1889), in the midwestern United States, representing the territorial expansion of the United States in the first 130 years from its founding, which is promoted as the "Shrine of Democracy". Former Presidents of the United States, while holding
Mount Rushmore 31, 1941, Gutzon Borglum and 400 workers sculpted the colossal 60 foot (18 m) high carvings of U.S. presidents George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln to represent the first 130 years of American history. These presidents were selected by Borglum because of their role in preserving the Republic and expanding its territory. The carving of Mount Rushmore involved the use of dynamite, followed by the process of "honeycombing", a process where workers drill holes close together, allowing small pieces to be removed by hand. In total, about of rock were blasted off the mountainside. The image of