For this Tiny Desk (home) concert, we pay a visit to the doctor's office. Actually, the venue is called Rare Violins of New York and it's something of a second home to cellist Jan Vogler, who pops in frequently to have the experts give his 1708 Stradivarius cello a thorough checkup.

Ludwig van Beethoven charted a powerful new course in music. His ideas may have been rooted in the work of European predecessors Wolfgang Amadeus Mozart and Josef Haydn, but the iconic German composer became who he was with the help of some familiar American values: life, liberty and the pursuit of happiness. That phrase, from the Declaration of Independence, is right out of the playbook of the Enlightenment, the philosophical movement that shook Europe in the 18th century.