The ancient civilization that constructed the Colosseum in Rome, famous for gladiatorial contests, is Ancient Rome. This iconic amphitheater, built between 70-80 AD, could hold tens of thousands of spectators and served various entertainment purposes, including gladiator battles and public spectacles. The Colosseum exemplifies Roman engineering prowess and architectural innovation, featuring advanced materials and construction techniques. It remains a symbol of Roman culture and societal values, representing both the grandeur and brutality of life in ancient Rome. Today, the Colosseum is one of the most recognizable monuments in the world and a prized heritage site.