Thyestes is a tragic play by the ancient Roman playwright Seneca. It tells the story of the bitter rivalry between two brothers, Atreus and Thyestes, who are embroiled in a cycle of revenge and violence. Atreus seeks to punish Thyestes for past wrongs, leading to horrific acts that culminate in a gruesome banquet. The play explores themes of betrayal, fate, and the consequences of unchecked ambition. It is notable for its intense emotional depth and moral complexity, reflecting the darker aspects of human nature. Thyestes remains a significant work in the study of classical literature and tragedy.