Chautauqua

What is in mind is a sort of Chautauqua—that's the only name I can think of for it—like the traveling tent-show Chautauquas that used to move across America, this America, the one that we are now in, an old-time series of popular talks intended to edify and entertain, improve the mind and bring culture and enlightenment to the ears and thoughts of the hearer.