Arnold of Brescia, an Italian monk, and disciple of Abelard; declaimed against the temporal power of the Pope, the corruptions of the Church, and the avarice of the clergy; headed an insurrection against the Pope in Rome, which collapsed under the Pope's interdict; at last was burned alive in 1156, and his ashes thrown into the Tiber.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Arnold, Thomas * Arnold of Winkelried