Built in the region of Isauria - Cilicia Trachea, the ancient city of Philadelphia is located today in the north of the Gökçeseki village in the Ermenek district of the Karaman province. In 2015, a rescue excavation was conducted in this ancient city’s necropolis. During the excavations, sarcophagi that were raised on podiums were discovered. Also, a large number of archaeological finds were unearthed in an area of 10x10 m just west of these sarcophagi. The subject of this study is a glass beaker with mythological figures found in this area. There are very few beakers with mythological figures in the literature. These are a special group of glass bearing high relief decorations, produced through mould-blowing, a technique that was discovered some seventy years after the free-blowing technique of Roman glassmaking. The body of this glass type features four male figures standing between columns joined by garlands of ivy. The identities of the figures are a matter of debate. There seems to be a consensus on the identity of two of them as Poseidon (Weinberg's Figure A) and Dionysus (Weinberg's Figure C), based on the attributes they hold in their hands. Various suggestions exist for the identities of the other two figures. Six fragments belonging to the rim and body of the Philadelphia beaker were discovered. The vessel that has been partially preserved is identical in form and decorative scheme to the glasses that have been published so far. The glass beakers of this type were found in both the eastern and western provinces of the Roman empire. Their origin is a matter of controversy. They were generally dated to the 2nd half of the 1st century AD. For the Philadelphia beaker, it can be suggested that it also dates back to the second half of the 1st century AD, taking into consideration the other finds from the area, in which the highest concentration of the artifacts point to the 1st-3rd centuries AD. There is no evidence of glass production in Philadelphia or its vicinity. Therefore, the Philadelphia find must have been imported to the city. The fact that the fragmentary glass was found in the necropolis of the city suggests that these beakers might have been used during funeral rituals.