Historical Setting
Sardis was the ancient capital of Lydia and an early Christian center; it is named among the seven churches addressed in the Book of Revelation. The surviving notices of Therapon are brief and hagiographic rather than archival, and they describe a missionary bishop active among the Greek population of the region during a period of imperial persecution.
The sources differ slightly on chronology. The OCA synaxarion and OrthodoxWiki place his life broadly in the third century, while other Menaion-derived accounts specify the reign of the emperor Valerian and date his death to about 259. The detailed itinerary of his sufferings — Sardis, Sinaion in Phrygia, Ancyra, and the River Astala, with his contest ending in the area of the Satalia diocese — is preserved in the fuller synaxarion tradition.