A newly discovered inscription from Antiokheia Paralios, commonly known as Antiochia ad Cragum, commemorates an athlete named Aur(elius) Salvianus, who won the pankration competition in the boys’ category during the first celebration of the themis Leonideios, established by Aur(elius) Leonidas. The inscription proves a crucial role in resolving uncertainties surrounding the themis, and significantly enhances the understanding of its nature and scope. It offers fresh interpretations of expressions found in other related inscriptions and it enables more precise inferences regarding the founding process of the themis and the life of its founder, Leonidas. Moreover, it establishes a clear timeline for both the founding and concluding dates of the themis. Additionally, it provides the basis for essential corrections and updates to previously published inscriptions related to the themis Leonideios.