The real name is Flavius amphitheatre but why does the whole world call it the Coliseum?
Perhaps he got the name from the enormous statue of the Emperor Nero, "the colossus" 35 metres high, which stood right next to the amphitheatre and has now been completely destroyed.
Like modern sports stadiums, the Coliseum gave spectators efficient protection from the sun thanks to its ingenious roof covering, the "Velarium". The Velarium was an enormous linen tarpaulin hung by a system of ropes, winches and wooden poles that girded the top of the outer wall. It took one hundred sailors from the Imperial fleet to move it. They moved in perfect synchrony to the beating of a drum.
After the VI century, with the Empire's decline, the Coliseum fell into disuse and its walls housed confraternities, hospitals, hermits and even a cemetery. From the Middle Ages onwards, the Coliseum has been one of Rome's and the world's greatest marvels, attracting hoards of visitors.
On the right, is visible the "Arch of Constantine".