Tanchelm

From 1112 he preached in Antwerp, the Duchy of Brabant, Flanders and Zeeland against the official church and its hierarchy, against the Real Presence in the Eucharist.

He was apparently also in Rome, where he is supposed to have campaigned, in vain, for an extension of the Bishopric of Thérouanne to cover the islands of the Scheldt.

[1] The followers of Tanchelm, who is reported to have allowed them to drink his bathwater, were still to be found for a period after his death in Antwerp; in 1124 Saint Norbert of Xanten preached against them.

He theorized that Tanchelm was a collaborator of the count of Flanders and, like his master, took sides with the Pope regarding the investiture controversy.

By acting so, he was declared an enemy by the bishop and the canons of Utrecht, who had taken sides with the Holy Roman Emperor.