It was finished in AD 80 so it is very old and many things have happened to it. During the middle ages it was used as a fort and from the 15th century it was used as a source for building materials for Rome's palaces. People took the iron fittings and used them as well. By the 1700's it was a ruin and since 1750 it has been dedicated to Christian martyrs killed there. Conservation began in the 19th century and is ongoing.
because of the weather
Roman Coliseum
yes it is the largest coliseum
The Romans.
So they can have the Olympics there
in 847 an earthquake hit the city of Rome shattering the roman coliseum. Parts of the arena fell of due to this and since the coliseum was made with the finest stone the remaining pieces were used to make other structures
Vespasian.
The coliseum
yep
they did
Elton john
It is a museum
circular, not oval