1. In 1792, the cornerstone for the new United States Capitol building was laid in what is now known as Capitol Hill. The building took nearly 33 years to complete and is now one of the most recognizable landmarks in Washington D.C.

2. March 14, 1862, marked the day that President Abraham Lincoln signed a law creating the District of Columbia Emancipation Act, which freed over 3,000 slaves in the District of Columbia. This was one of the first steps towards the eventual abolition of slavery in the United States.

3. On March 14, 1912, D.C. suffered one of its worst disasters when a massive snowstorm hit the city, causing power outages, food shortages, and transportation disruptions for days. Many homes and buildings collapsed under the weight of the heavy snow, resulting in multiple fatalities.

4. In 1964, on March 14, civil rights activists staged a sit-in at the White House to protest the segregation of public facilities in the South. The demonstration was organized by the Congress of Racial Equality (CORE) and marked a significant moment in the Civil Rights Movement.

5. March 14, 2003, was the day that anti-war protests erupted across the country, including in Washington D.C., as the United States prepared to invade Iraq. Thousands of protesters marched through the streets to voice their opposition to the war, sparking a national movement that lasted for years.