A Colosseum costs less to build than a Cathedral, but costs more maintenance and makes fewer people content.
The original Colosseum of Rome presented spectacles intended to entertain and divert the landless, jobless citizenry who were supported by massive handouts. As the Empire declined, the increasing barbarity of the spectacles came to reflect the moral bankruptcy of Rome. In the 20th Century, Colosseums have been revived, again to provide entertainment and diversion. The promotions today are music concerts and professional sports contests. However, the modern spectacles have not exhibited the barbarity of ancient times, with the notable exception of ice hockey games.