Theseus

Greek (Attic), Red-figured kylix showing the deeds of Theseus, 440-430 BCE, terracotta, 12.7 x 33.02 cm, British Museum, London

Theseus is one of the most important classical heroes who appears in several important Greek myths.  He is most commonly known for battling and slaying the Minotaur and escaping the Labyrinth with the help of Ariadne (the daughter of King Minos) and a ball of thread.  

Theseus is typically depicted either nude (as seen here), or in a short classical garment, often with a helmet.  At times he also has a club.  This plate also features the six labors of Theseus.