They adapted to their religious beliefs the 12 gods of Olympus tough they changed their original names Aphrodite became Venus. Apollo remained Apollo Ares became Mars Artemis became Diana Athena became Minerva Demeter became Ceres Hades became Pluto Hephaistos became Vulcan Hera became Juno Hermes became Mercury Hestia became Vesta Persephone became Proserpina Poseidon became Neptune Zeus became Jupiter They adapted their architecture temples made from marble with the classical design The more common are Ionian the Corinthian and the Doric architecture styles they also adapted the Greek theatron , the theatre which is the usual half circle known as Amphitheatre . More important they adapted the Euboea variation of the Greek alphabet that