The worship of Sol was introduced to the Romans by Titus Tatius. It is believed the Roman pantheon had two sun gods. The worship of the first (Sol Indiges, the native sun), eventually died out, whereas the cult of the second (Sol Invictus, the invincible sun), was reinvigorated by the Emperor Aurelian. The namesake god of Emperor Elagabalus was later assimilated into the cult of Sol. As the Greek name of Sol was Helios, an alternative form of Elagabalus was Heliogabalus.