How has the basic outline of Washington DC change from way originally imagined it?

1. The Capitol Building: L'Enfant's plan called for the Capitol Building to be a single, domed structure located at the highest point in the city. However, due to budget constraints, the building was initially constructed with a wooden dome and wings that were added later.

2. The White House: L'Enfant's plan placed the President's House (now known as the White House) on the north side of Pennsylvania Avenue, facing the Capitol. However, the building's location was changed to its current position on the south side of Pennsylvania Avenue during the construction process.

3. The National Mall: L'Enfant envisioned the National Mall as a grand, tree-lined avenue stretching from the Capitol Building to the Potomac River. However, the mall was not fully developed according to his plan until the early 20th century.

4. The Washington Monument: L'Enfant's plan included a monument to George Washington, but its specific design and location were not determined until later. The obelisk-shaped Washington Monument was eventually completed in 1884.

5. The Lincoln Memorial and Reflecting Pool: These iconic structures were not part of L'Enfant's original plan and were added later in the 20th century.

6. The Federal Triangle: This area of downtown Washington, DC, which is home to several federal buildings, was not part of L'Enfant's original plan and was developed in the early 20th century.

7. The National Mall and Memorial Parks: The National Mall and its surrounding memorial parks have been expanded and developed over time to include numerous monuments, memorials, and museums dedicated to various historical figures and events.

8. The Anacostia Waterfront: L'Enfant's plan did not include significant development along the Anacostia River, but this area has undergone significant redevelopment and revitalization in recent decades.

Overall, while the basic layout of Washington, DC, still reflects L'Enfant's original design, there have been numerous modifications, expansions, and additions to the city over time, shaping it into the vibrant capital city it is today.