Washington D.C. has a rich history when it comes to Black Americans and their contributions to the city. Here are a few key points:

1. **Chocolate City**: Washington D.C. was once known as "Chocolate City" due to its large Black population. In the 1970s, around 70% of the city's residents were Black, making it one of the most prominent African American cities in the United States.

2. **Civil Rights Movement**: Washington D.C. played a significant role in the Civil Rights Movement. The famous March on Washington for Jobs and Freedom took place in D.C. in 1963, where Dr. Martin Luther King Jr. delivered his iconic "I Have a Dream" speech at the Lincoln Memorial.

3. **Howard University**: Howard University, a historically Black university located in Washington D.C., has been a hub for Black intellectual and cultural life since its founding in 1867. It has produced many notable Black leaders in various fields.

4. **Politically Influential**: Washington D.C. has been home to many Black politicians and leaders. For example, in 1978, Walter E. Washington became the first African American mayor of D.C. Additionally, the district has been represented by notable Black figures in Congress, such as Eleanor Holmes Norton.

5. **Cultural Heritage**: The city is rich in African American cultural heritage, with institutions like the National Museum of African American History and Culture, the Frederick Douglass National Historic Site, and the Anacostia Community Museum celebrating Black history and contributions.

Overall, Washington D.C. has been a crucial center for Black culture, activism, and progress throughout American history.