Amphitheater in ancient Rome, begun by the emperor Vespasian to replace the one destroyed by fire during the reign of Nero, and completed by his son Titus AD 80. It was 187 m/615 ft long and 49 m/160 ft high, and seated 50,000 people. Early Christians were martyred there by lions and gladiators. It could be flooded for mock sea battles.

Variant of Coliseum.