THEOI GREEK MYTHOLOGY - Exploring Mythology in Classical Literature & Art. Welcome to the Theoi Project, a site exploring Greek mythology and the gods in classical literature and art. The aim of the project is to provide a comprehensive, free reference guide to the gods (theoi), spirits (daimones), fabulous creatures (theres) and heroes of ancient Greek mythology and religion.. Greek mythology, Greek myths, classical mythology, Greek gods, Greek goddesses, Titans, Greek pantheon, Greek heroes, mythical monsters, fabulous beasts, Greek gods family tree, classical texts, classical e-texts, classical quotes, ancient Greek art, ancient Roman art, Greek vase paintings, Roman mosaics, Roman frescoes