Laocoön and His Sons
Sculpted by Agesander of Rhodes, Athenodoros of Rhodes, and Polydorus of Rhodes. 1st century BCE. Marble, height 6′ 10″ (2.1 meters). Musei Vaticani, Museo Pio Clementino, Cortile Ottagano, Rome.
Khan Academy Video
Vatican Museum Article
Greco-Roman Mythology Website