The Colosseum is replaced by the following unique buildings:
A Colosseum increases a city's happiness and its happiness output from using the culture slider. Common tactic is when the people are unhappy. This building can be a better synergy with the Courthouse to counter unhappiness and war weariness.
The original colosseum provided entertainment for the common people of Roman society by presenting them with spectacles and events as a temporary escape from day-to-day life. This concept has been revived in the 20th century. Modern-day stadiums and civic centers provide an arena for entertainment ranging from concerts to professional sporting events. Although the violent spectacle of gladiatorial combat is a thing of the past, today's colosseums still provide entertainment and diversion for the masses.