Jupiter's Temple

Overview

The Temple of Jupiter is a remarkably well-preserved Roman temple within Diocletian's Palace, originally dedicated to the king of the Roman gods. It was later converted into the Baptistery of Saint John and still contains an 11th-century baptismal font.

Highlights

• Intact Barrel Vault: The original coffered Roman ceiling vault is one of the best-preserved in existence.
• Headless Sphinx: A second Egyptian sphinx (missing its head) guards the entrance.
• Baptismal Font: The medieval font features an intricately carved relief of a Croatian king, believed to be King Zvonimir.

History

Built around 305 AD as part of Diocletian's temple complex, the Temple of Jupiter was converted into a Christian baptistery in the early medieval period. The irony of converting the pagan emperor's temple into a Christian space mirrors the cathedral's transformation from his mausoleum.

Visitor Tips

• Small Space: The temple is tiny — brief but impressive.
• Duration: 10–20 minutes.