Thomas Jefferson is known as one of our great American presidents, largely due to his proficiency in a wide range of fields. The dude spoke five languages and wrote the Declaration of Independence. He was an accomplished inventor who created plans for a macaroni machine and installed his "Great Clock" powered by the Earth's gravitational pull on Revolutionary War cannonballs in the house he designed, Monticello. Lesser known among his areas of expertise is his love for music, which he declared the "passion of my soul." Jefferson played clavichord and cello but focused mainly on violin. His wife Martha was a musician as well and shredded (well, probably not) on the guitar and clavichord.