1. In 1990, the National Museum of Women in the Arts opened in Washington, D.C. The museum is dedicated to recognizing the achievements of women artists from all over the world.

2. On July 23, 1967, one of the worst riots in the history of the city broke out in the Washington, D.C. The uprising was sparked by the arrest of an African-American man accused of stealing a car. The event left 12 people dead, over 1,000 injured, and hundreds of buildings damaged or destroyed.

3. In 1970, the first ever Earth Day was held in the United States. The event was organized by Senator Gaylord Nelson and was celebrated in many cities, including Washington, D.C.

4. On July 23, 1903, the Ford Motor Company was incorporated. The automobile company would go on to revolutionize the industry and become one of the most successful corporations in American history.

5. The Washington D.C. Metro opened on July 23, 1976. The subway system serves the Washington, D.C. metropolitan area and is one of the busiest transit systems in the United States.