From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
The medallion of Asclepius.
Asclepius is one of the Lords of Kobol, the god of healing.
Asclepius is known in the Colonials' polytheistic mythology as having healed with the blood of a Gorgon. He is symbolized by a medallion featuring a Caduceus, which he finds in the possession of one of his disciples, Lilly.
Gaius Baltar angrily denounces Asclepius and other Lords of Kobol as he interrupts a temple ceremony before being restrained and jailed (TRS: "Escape Velocity").