From what I understood from Tolga, Athena was sort of the patron goddess of the natives of Pergamon, Zeus was more of a Greek god, and Ra belonged to the Egyptians. The melding of all those religions, along with the combined knowledge, art, and architecture, proved to be very telling of the nature of sharing, discussion, and acceptance of the city. Another big pull for the city was the Asklepion, or hospital/health spa a bit outside Pergamon. Rescues by [Apollo] from the belly of a burning adulteress and raised by woodland fairies, Asklepios grew up to become a renowned doctor because of his knowledge of roots and medicinal herbs and his close friendship with Zeus. Later, his hospital also contained priests to make offerings to the Gods on the sick patients’ behalf. Part of the knowledge of the day included that illness and diseases entered the body while a person was sleeping. The priests and doctors then logically concluded that said sickness would leave the body while the patient was asleep. Thus, patients were often lulled to sleep by music, the sound of running water, and heavy hallucinogenics or narcotics what were sol d in the stoas and porticos outside the hospital. It’s said that every patient admitted to the Asklepion left cured, but this may have to do with the doctors’ treating only those who they knew they could heal in good time. Additionally, there was a theater on site to entertain the patients and put their minds at ease.