Tens of thousands gathered to hear him
Without a microphone.
He traveled all around the country to preach.
Bernadine of Siena, the most powerful preacher of the century, literally wore himself out in the service of God: dropping to the ground and dying on this very day in 1444 (like this year, the vigil of the Ascension). He was canonized six years later.
(adapted from an earlier post)