The Baptistery of St. John: Florence's oldest gold

Why go inside (not just circle it)

The common mistake is photographing the doors and moving on. But the baptistery works from within: look up and you find a dome entirely lined with gold-ground mosaics, begun around 1225 — before the Gothic cathedral even existed.

• The Christ in Judgment, over 8 metres tall, dominates the Last Judgment: paradise on one side, a devil-crowded hell on the other — imagery Dante knew by heart.
• The stories of Genesis, Joseph, Mary and John the Baptist run in concentric registers up to the lantern.
• The floor of oriental-patterned inlay with zodiac signs — an echo of Florence's trade with the East.

The three doors: where the Renaissance begins

Each side of the baptistery tells a different century of sculpture:

• South doors — Andrea Pisano (1330–1336): the Baptist's story in elegant Gothic frames.
• North doors — Lorenzo Ghiberti (1403–1424): the outcome of the legendary competition of 1401, won against Brunelleschi — who, stung by the loss, turned to architecture. Some defeats build domes.
• East doors — the Gates of Paradise (1425–1452): ten gilded panels where Ghiberti invents perspective in bronze. Tradition says Michelangelo coined the nickname.

The doors in place are replicas: the restored originals shine at theOpera del Duomo Museum, fifty metres away — on the same ticket.

Dante's baptism and a thousand years of history

Consecrated in 1059, the baptistery was for centuries Florence's only baptismal font: every Florentine — Dante included — began civic and religious life here. In the Divine Comedy the poet calls it his "bel San Giovanni" and dreamed of receiving the laurel crown inside. Excavations have disproved the legend of a Roman temple of Mars beneath it, but the appeal stands: genuine Roman remains run under and around the octagon.

Practical information

Visiting strategy

• First hour (8:30–9:30 am): the baptistery opens before the cathedral — start here and skip the groups.
• Pair it with the museum: original doors and replicas on the same day tell the complete story.
• Restorations: mosaics are restored in sections; if scaffolding covers the vault, the museum compensates with Ghiberti's panels at arm's length.

Facts checked against the official site duomo.firenze.it — duomo.firenze.it