The gods Dionysus and Venus are amongst the most prominent subjects in Roman wall painting and mosaic art. Those gods were identified still in Greece with hedonistic values, but are carry wide significances in the religious, sacred and cultic fields. The course is interested in examining those many significances by an extensive analysis of mosaic from the whole Roman world: Rome and Pompeii, North Africa, Antioch, Cyprus, Italy, Spain, the Land of Israel and others. The discussion will extend to the many aspects concerning those gods: mythological, literary, religious, cultic, philosophical and historical.