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Tribal leaders, including these Arapaho and Cheyenne delegates, negotiated with federal authorities in Washington, D.C.

Suffrage Pins and Ribbons, ca. 1909–1916

In 1889 and 1893, homesteaders staked claims on land in the Cherokee Strip, Oklahoma Territory.

Children stroll toward the Capitol’s east front.

In 1913, Congress authorized dam construction in Yosemite’s Hetch Hetchy Valley, despite objections of conservationists

Pittsburgh’s steel mills propelled industrial prosperity, but left its residents living in smoke and smog

Construction of the Rare Book Room addition, Library of Congress, Thomas Jefferson Building, ca. 1931.Construction of the Rare Book Room addition, Library of Congress, Thomas Jefferson Building, ca. 1931.

Proposed design for a new Senate Chamber with windows, by Carrère & Hastings, 1924.

Joseph G. Cannon, by William T. Smedley, 1912