 The religion was brought to Greece by Egyptian priests, initially for the small Egyptian communities in the port cities of the Greek world.Although the Egyptian religion found only a small audience among the Greeks themselves, her popularity spread under the Roman empire, and Diodorus Siculus wrote that the religion was known throughout almost the whole inhabited world.Almost as famous was the cult of Serapis, a Greek deity despite the Egyptian name, which was created in Egypt under the Ptolemaic dynasty.