Not likely. This is a strange kind of town square. First of all, it has to protect wealthy elites, emperors, and so on, in a society with appalling wealth ine

Not likely. This is a strange kind of town square. First of all, it has to protect wealthy elites, emperors, and so on, in a society with appalling wealth inequality. All people who would be unable to enter a town square without elite soldiers / praetorian guard / varangian guard to protect them. Secondly, this town square is not a public space, it's the wholly owned private property of a collection of ultra-wealthy people and institutions (or a single wealthy individual, who may as well be Caligula at this point). Finally, the town square already isn't a great model: there were town squares during the reign of Caligula, the entire institution of serfdom, during slavery in the American colonies, during Jim Crow. What was discussed there? Whose "free speech" was protected there?