Located just behind the cathedral, the museum was founded in 1891 to hold the works of art that were originally decorating the Baptistry of San Giovanni, the Duomo and Giotto's Bell Tower.
There are over 750 medieval and Renaissance statues and reliefs situated over three floors in 25 rooms. The masterpieces include works by Donatello, Luca della Robbia, Michelangelo or Andrea Pisano.
The admission to the museum is included in the ticket for the whole complex, so it's definitely worth exploring. It doesn't even get much crowded.
Daily: 9 a.m. - 7 p.m.
General admission: €15
The ticket includes Opera Museum, Crypt of Santa Reparata, Giotto's Bell Tower, Baptisery, Duomo and Santa Maria del Fiore Cathedral.
Wikipedia https://en.wikipedia.org/wiki/Museo_dell'Opera_del_Duomo_(Florence)
Official website http://www.museumflorence.com/monuments/6-museum
Email opera@operaduomo.firenze.it
Phone +39 055 2302885
Address Via della Canonica 1, 50122 Florence, Italy
Coordinates 43°46'24.023" N 11°15'28.921" E
