Here are five historical facts about September 24 in the District of Columbia:

1. In 1791, President George Washington laid the cornerstone for the new United States Capitol building in the District of Columbia.
2. On September 24, 1855, the first public school for African American children, the Preparatory High School for Colored Youth, opened in the District of Columbia.
3. In 1901, President Theodore Roosevelt laid the cornerstone for the new building of the District of Columbia Public Library's central branch. The building is still in use today.
4. On September 24, 1962, the National Farm Workers Association (later known as United Farm Workers) was formed by Cesar Chavez and Dolores Huerta in the District of Columbia.
5. In 2016, the Smithsonian National Museum of African American History and Culture opened to the public in the District of Columbia on September 24th.