Musaeus of Athens (, Mousaios) was a legendary polymath, philosopher, historian, prophet, seer, priest, poet, and musician, said to have been the founder of priestly poetry in Attica. He composed dedicatory and purificatory hymns and prose treatises, and oracular responses. Herodotus reports that, during the reign of Peisistratus at Athens, the scholar Onomacritus collected and arranged the oracles of Musaeus but inserted forgeries of his own devising, later detected by Lasus of Hermione. The mystic and oracular verses and customs of Attica, especially of Eleusis, are connected with his name. A Titanomachia and Theogonia are also attributed to him by Gottfried Kinkel.