Battistero di San Giovanni
The Battistero di San Giovanni sits at the foot of a flight of stairs below Siena's cathedral, and the fact that it exists at all is a piece of medieval problem-solving. When the Opera del Duomo decided in 1317 to extend the cathedral choir outward over a steep drop, someone had to hold up the floor — and so a baptistery was built beneath it, its ceiling becoming the choir's foundation.
Step inside and the hexagonal bronze font at the centre pulls everything toward it. Five sculptors worked on it between 1417 and 1431 — Donatello, Ghiberti, Jacopo della Quercia among them — each contributing panels on the life of John the Baptist. The frescoed walls above, painted by Vecchietta and his school in the 1440s, complete the enclosure.
💛 What travellers fall for
Repeat visitors tend to go straight to Donatello's 'Herod's Banquet' panel and stand with it longer than they planned. The figures recoil from the severed head in a way that still reads as genuinely unsettled. Coming early, before the cathedral crowds filter down the staircase, means you often have the font to yourself.
Deals in Battistero di San Giovanni
Book directly at the providerHow Battistero di San Giovanni came to be
Construction began in 1316 under master builder Camaino di Crescentino and was complete by 1325 — the structure raised specifically to support the extended choir bays of the cathedral above. The Gothic marble façade came later, commissioned to Domenico di Agostino from 1355 onward, though work stopped in 1382 and the upper section was never finished. The black-and-white marble matches the cathedral's own striping.
The interior's defining object arrived across the following century: the hexagonal baptismal font, assembled between 1417 and 1431 by a group of sculptors that reads like a roll call of early Renaissance talent — Donatello, Lorenzo Ghiberti, Giovanni di Turino, Goro di Neroccio and Jacopo della Quercia. The vault frescoes in the apse were added by Michele di Matteo da Bologna in 1477.
Who and what shaped it
People who shaped it
Landmark buildings
Plan your visit
On the map
When to go
Right now
Background & history adapted from Wikipedia (CC BY-SA) · specs from Wikidata (CC0) · weather from Open-Meteo · map data © OpenStreetMap contributors · photos from Wikimedia Commons / Unsplash with per-image credit. No third-party reviews or social posts reproduced.