He seems to have been assassinated by a priest in an obscure brawl, about the year 1115.
By the middle of the 12th century, other and purer heresiarchs had arisen.

Many Netherlanders became converts to the doctrines of Waldo.
From that period until the appearance of Luther, a succession of sects--Waldenses, Albigenses, Perfectists, Lollards, Poplicans, Arnaldists, Bohemian Brothers--waged perpetual but unequal warfare with the power and depravity of the Church, fertilizing with their blood the future field of the Reformation.

Nowhere was the persecution of heretics more relentless than in the Netherlands.

Suspected persons were subjected to various torturing but ridiculous ordeals.

After such trial, death by fire was the usual but, perhaps, not the most severe form of execution.
In Flanders, monastic ingenuity had invented another most painful punishment for Waldenses and similar malefactors.