Why does the Pantheon inscription name Agrippa?
Hadrian kept Agrippa’s name on the façade to honor the founder of the original Pantheon rather than placing his own name there.
Fact-Check & Sources
Sources: ROME: Keys to the Ancient City, printed pages 186–187 (PDF pages 184–185). Cross-checked 21/09/2026 against the Pantheon Basilica’s official history and audio-guide materials at pantheonroma.com. Human review by Patty pending.
Last fact-checked: 21/09/2026
Quick Answer
The inscription credits Marcus Agrippa because he built the original Pantheon. Hadrian rebuilt the monument in the second century AD but retained Agrippa’s dedication instead of advertising himself on the façade.
Patty's Lens
Rome loves layers, and this inscription is a perfect one: an Augustan name on a Hadrianic building. The stone tells you that rebuilding did not require erasing memory.
The large Latin inscription reads, in essence, “Marcus Agrippa, son of Lucius, consul for the third time, built this.” Agrippa did build the first Pantheon, but the present structure belongs to Hadrian’s reign. By restoring Agrippa’s dedication, Hadrian linked his new monument to Augustus’s celebrated age and followed his habit of not prominently signing many of his public works.
Visitors see Agrippa’s name before they hear that Hadrian built the surviving Pantheon, creating an apparent contradiction.
Pause in Piazza della Rotonda and read the inscription before entering. It is easiest to understand when you can compare the Augustan message outside with the Hadrianic engineering inside.
The inscription remembers the first Pantheon even though the building behind it is Hadrian’s reconstruction.
What to Notice
- Agrippa’s dedicationLook above the columns for the large inscription naming Agrippa.
- The straight porticoNotice the traditional lines of the columned entrance.
- The round rotundaStep inside and compare the circular space with the façade you just saw.
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Frequently Asked Questions About the Pantheon
What does the Pantheon inscription say?
It states that Marcus Agrippa, son of Lucius, built it while consul for the third time.
Is the inscription historically wrong?
It accurately honors Agrippa’s original monument, although the structure now standing was built under Hadrian.
Why did Hadrian leave off his own name?
Hadrian often restored monuments without prominently adding his own name and may also have wished to connect the building with Augustus’s age.
Was the inscription added later?
The present façade belongs to Hadrian’s rebuilding, which reproduced Agrippa’s earlier dedication.
Who was Marcus Agrippa?
He was Augustus’s close ally, general, son-in-law, and an important builder in Augustan Rome.
Where is the inscription?
It stretches across the front of the portico beneath the triangular pediment.