I’ve been to the Uffizi...more famous art there than you can shake a stick at. When you’re done at the Uffizi, cross the Arno River via Ponte Vecchio...pay a visit to the Pitti Palace...even more art. You’ll be cross-eyed when you finish. Fun stuff.
There's actually a psychological condition, Stendhal Syndrome aka "Florence Syndrome" brought on by the reactions some people experience when exposed to profound emotional triggers (usually artistic).