|Effect||Enemy city walls no longer prevent their cities from flipping|
This wonder can be built when the player discovers the Mass Media technology and its benefit is that it allows the player to convert/flip enemy cities even if they have city walls. This wonder's benefit is never cancelled.
Note that this Wonder's benefit only applies to the civilization that builds it, so don't worry about enemy civilizations being able to convert/flip your cities if you build it. This wonder will be quite important for most players to build in the modern era especially if they have low culture, as it can prevent other civilizations from gaining the ability to convert/flip their cities.