Piazza della Signoria and Palazzo Vecchio
“The civic center of Florence for more than 700 years, the Piazza della Signoria is now a popular outdoor sculpture gallery, drawing tourists to its cafes and round-the-clock street life. some of the sculptures are originals--such as Giambologna's bronze of Grand Duke Cosimo I on horseback--while others (notably Michelangelo's "David" and Donatello's "Marzocco" and "Judith Beheading Holofernes") are replicas, their originals now residing in Florence's various museums, sheltered from the elements. In front of Barolomeo Ammannati's "Neptune" fountain is a plaque marking the spot where Savonarola held his Bonfire of the Vanities in the 1490s, encouraging Florentines to burn their mirrors, books, games, wigs, paintings, and other symbols of decadent irreligion. The Florentines' zeal for his brand of puritanism lasted only so long, and in 1498, after hanging Savonarola, they burned him on the very same spot.
(1000 Places to See Before You Die)”