If you have ever studied art history, Michelangelo’s David probably came up in a discussion or two. Its true, it is an absolutely incredible piece to see. 15 feet of pure marble carved into man form without the computerized sandblasting technology that we have today. Only be advised, Florence decided to be tricky when it comes to seeing the real David. There are multiple Davids in Florence. The real David can be found in Accademia di Belle Arti where they forbid taking photos (though you can probably get one or two if you are sneaky enough). If you do not want to stand in line to see the original, there is a copy of the statue in the original location in front of the Palazzo Vecchio.
(Unfortunately these were the only photos I took, which means you need to visit Florence and see it for yourself.)