In which building is the original U.S. Constitution kept?

The original U.S. Constitution is housed in the National Archives Building in Washington, D.C. This facility is specifically designed to preserve and protect important historical documents, including the Constitution, the Bill of Rights, and the Declaration of Independence. The National Archives ensures these foundational texts are accessible to the public while also safeguarding them in a controlled environment that minimizes deterioration.

The other locations mentioned serve significant roles in the federal government but do not house the original Constitution. The Capitol Building is known for its legislative functions, the White House is the official residence and workplace of the President, and the Supreme Court Building is where the nation’s highest court conducts its business. Each of these buildings is important in its own capacity, but the preservation and display of the Constitution are specifically entrusted to the National Archives.