By the early 20th century, however, L'Enfant's vision of a grand national capital was marred by slums and randomly placed buildings in the city, including a railroad station on National Mall. Congress formed a special committee charged with beautifying Washington's ceremonial core. What became known as the McMillan Plan was finalized in 1901 and included landscaping the Capitol grounds and National Mall, clearing slums, and establishing a new citywide park system. The plan is thought to have largely preserved L'Enfant's intended design for the city.