A highlight of the Sala del Tesoro is the monumental cross and the altar from the baptistery that was made using 250 kg of silver. The altar is the work of several generations of artists from 1366 to 1483.
As the main altar for the baptistery, it not surprisingly shows events from the life of John the Baptist. It covers his full biblical history from the annunciation to Zacharias and the visitation to the grizzly end.
The sculpture of John the Baptist at the center front of the altar is by Michelozzo.