Thomas Jefferson put his secretary in the big East Room.
He was the one who told William Clark and Meriwether Lewis to explore the Louisiana Purchase and they brought back bones and he put them in his East Room too.
Millard Fillmore's wife, Abigail, was a school teacher and was didn't approve of their being no books in the White House. She added the first library in the White House.
Millard Fillmore was more interested in food so he installed stoves and ovens.
Theodore Roosevelt said his house was too small for his family. He made the West Wing, and moved all of offices into the second floor and made new floors and a panel for his trophies.
Rats had lived in White House walls and were disturbed and stole food and terrified anyone in their path.