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- Congressional Library in the U.S. Capitol, 1862-1875 - During most of the 19th century, the Library of Congress was housed in the U.S. Capitol. In 1851, disaster struck when a fire destroyed a large portion of the Library's collection. A year later, Congress approved funding for the acquisition of books and the construction of a fireproof cast-iron room. The dedicated library space opened in 1853.

- 1862-1875
- Collections - Artifact
Congressional Library in the U.S. Capitol, 1862-1875
During most of the 19th century, the Library of Congress was housed in the U.S. Capitol. In 1851, disaster struck when a fire destroyed a large portion of the Library's collection. A year later, Congress approved funding for the acquisition of books and the construction of a fireproof cast-iron room. The dedicated library space opened in 1853.
- The U.S. Patent Office, circa 1869 - In 1836, the U.S. Congress authorized the building of a new patent office. The white marble neoclassical building, located in the center of Washington, D.C., was to be a general repository of American inventions and improvements in machinery and manufactures. During the Civil War, the three-story building served as a makeshift hospital and as site of President Abraham Lincoln's second Inaugural Ball.

- circa 1869
- Collections - Artifact
The U.S. Patent Office, circa 1869
In 1836, the U.S. Congress authorized the building of a new patent office. The white marble neoclassical building, located in the center of Washington, D.C., was to be a general repository of American inventions and improvements in machinery and manufactures. During the Civil War, the three-story building served as a makeshift hospital and as site of President Abraham Lincoln's second Inaugural Ball.
- Model Room of the U.S. Patent Office, Washington, D.C., circa 1870 - In 1836, the U.S. Congress authorized the building of a new patent office. The white marble neoclassical building, located in the center of Washington, D.C., was to be a general repository of American inventions and improvements in machinery and manufactures. Inside the three-story building, government officials displayed thousands of patent models along with other national treasures.

- circa 1870
- Collections - Artifact
Model Room of the U.S. Patent Office, Washington, D.C., circa 1870
In 1836, the U.S. Congress authorized the building of a new patent office. The white marble neoclassical building, located in the center of Washington, D.C., was to be a general repository of American inventions and improvements in machinery and manufactures. Inside the three-story building, government officials displayed thousands of patent models along with other national treasures.