Temple of Jupiter Invictus

It was credited as the sight of several divine portents during the imperial period, and may have been the shrine briefly dedicated to the Syrian god Elagabal by the emperor Elagabalus in the third century CE.

[2] An older temple to Jupiter was vowed by the Roman commander and consul Quintus Fabius Maximus Rullianus during the Battle of Sentinum in 295 BCE, and was built on the Quirinal Hill over the next few years.

[2] It has been assumed that this was the temple that was redesigned during the reign of Domitian (r. 81–96 CE) as part of his massive rebuilding works on the Palatine, and which sat at the entrance of the imperial residence known as the Domus Augustana beside a monumental arch.

[4] The third-century Roman historian Cassius Dio recorded that the temple had been struck by lightning, a phenomenon generally regarded in ancient Rome as a divine portent sent by Jupiter, in 42 BCE.

According to Dio, the temple's doors opened spontaneously before the assassination of Caligula's successor, Claudius, in 54 CE, which was retrospectively taken as an omen of his death.