A restoration of the Roman Colosseum’s southern piazza has been completed after four years of construction, according to Artnet News. The project, led by Stefano Boeri Interiors, has recreated the travertine-paved pedestrian plaza outside the amphitheater’s southern façade, where spectators once waited to enter the arena. Built between 70 and 80 CE, the Roman Colosseum remains one of the engineering marvels of the world. At four stories high and with 80 arched entrances, the amphitheater could seat 50,000 or more people, equal to a modern stadium. Even more impressive, it was completely freestanding, supported by a complex vault system. Related Articles It had a retractable awning system to shade spectators, and a complement of latrines and water fountains. Its most famous use was for gladiator games, in which enslaved people or prisoners of war fought each other or wild animals to the death. It also presented public executions and mock naval battles, for which the amphitheater could reportedly be filled with water. After the fall of the Roman Empire, the Colosseum was used as a …