The Coliseum was the former arena in ancient Rome. - Coliseum oli aikaisemmin areena muinaisessa Roomassa.
I don't know when he decided to leave Rome. - En tiedä milloin hän päätti lähteä Roomasta.
the leadership of the Roman Catholic Church capital and largest city of Italy; on the Tiber; seat of the Roman Catholic Church; formerly the capital of the Roman Republic and the Roman Empire