So historian Mary Beard, 69, had to learn to snorkel to examine ... They portray figures including Dionysus, the ancient Greek god of wine-making, the Roman goddess Venus and Antonia Minor ...

Part 1 The story begins with Dionysus - the god of wine - someone who likes to 'let himself go'. One day Dionysus and his band of revellers are enjoying themselves at the foot of Mount Tmolus when ...