Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, was completed a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.

• Awhich was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian,  
• Bofficially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian, and  
• Cwhich was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, and  
• Dofficially known as the Flavian Amphitheater and begun in A.D. 69, during the reign of Vespasian it  
• Eofficially known as the Flavian Amphitheater, which was begun in A.D. 69, during the reign of Vespasian, and