Thomas Jefferson's home, Monticello, was always a work in progress and he kept returning to it even during his presidency, staying months at a time. In fact, throughout his lifetime, he was preoccupied with the design and enhancement of the 35-room house. Some of the additions Thomas Jefferson made were way ahead of the times. The skylights he installed throughout the residence were among the first in American homes. Another example: many of the windows throughout the house were triple sash to enhance circulation. Jefferson also incorporated into Monticello beds in alcoves to create more space, a rotating bookcase, and a rotating clothes rack in his closet.