National Museum of American History

A wooden bar (6-1/8" x 2" x 3/4") is attached to a flat wooden handle (17-7/8" x 2" x 1/8") by nine wooden pegs. By the 17th century, draftsmen used T-squares to help them draw horizontal lines.

National Museum of American History print — Victory Dance Creative

Presente! exhibit opens on the National Mall in Washington D.C : NPR

Smithsonian National Museum of African American History and Culture by David Adjaye: Commemorating America's Black heritage - RTF

National Museum of American History print — Victory Dance Creative

National Museum of American History Collects History Related to

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National Museum of American History, Washington, DC, USA

Smithsonian National Museum of American History Washington DC Editorial Image - Image of museums, america: 47442180

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Smithsonian Museum of African America History and Culture

Smithsonian National Museum of American History on Behance

National Museum of African American History and Culture - Ralph

130+ National Museum Of African American History And Culture Stock Photos, Pictures & Royalty-Free Images - iStock

Smithsonian names first woman to top post at American History Museum