The Temple of Zeus Cyrius stood in the city of Dura-Europos (Syria) and The construction of the original temenos is dated by the inscriptions above its altar and on its cult reliefs to the end of the second decade of the first century after Christ.
This site seems to have been chosen deliberately, since towers are a well-attested part of Syrian temple architecture.
A stele was found in the sanctuary, with either a cult image or a dedicatory relief on it.
The stele shows Zeus seated at right and a donor who appears to be a Palmyrene man.
A further Greek inscription on the stele again names Seleukos, gives the date, and refers to the god as Zeus Kyrios.