Below, a coin of the Roman Emperor Trajan, circa 1st century A.D., issued for Egypt, showing on its reverse side the Agathodaemon as a large serpent.
Below, a wall fresco or painting showing an offering to the Agatho Daemon serpent, coiling itself about the altar in a garden setting (from a house in Pompeii, Italy, 1st century A.D.).
Below, a fresco or wall painting showing an offering to the Agatho Daemon by the Genius of the house in toga, accompanied by two gods associated with good luck and good fortune holding a drinking rhython and bucket (Roman Empire, 1st century A.D. Pompeii, Italy).
Below, a fresco showing two agatho daemons accompanied by other Egyptian gods including Isis in a boat (Roman Empire period)
Please click here for additional pictures of the Agathos Daemon (Agathodaemon, Agathodaimon)

Please click here for the Agathos Daemon as a possible prototype of Satan as the Serpent in the Garden of Eden, as conceived by early Christians in the 1st century A.D.