During the administration of President Harry S. Truman, the White House underwent a renovation and expansion so extensive, it changed the Executive Mansion more than the fire of 1814. The White House we know today is largely due to the renovation led by Truman. The construction took place between 1948 and 1952 and was a remarkable feat of engineering. National Park Service photographer Abbie Rowe captured the entire process on film and the below galleries document the transformation.