Konrad von Marburg

After receiving a commission from the Archbishop of Mainz, Siegfried II,[5] Konrad set to work seeking out heresy in both Thuringia[1] and Hesse, and quickly gained a reputation for being unreasonable and unjust.

[7][8] Konrad teamed up with Conrad Dorso and John the One-Eyed in the Upper Rhineland, burning many heretics with barely the semblance of a trial.

[10][11] Konrad refused to accept the decision and demanded that a verdict be reached, but eventually gave up and left Mainz to return to Marburg.

The reputation he amassed in the course of his years as an inquisitor, gradually spread throughout Europe, overcoming the local boundaries of his original area of activity; and was that of an overly harsh judge.

The place where Konrad was killed, Hof Kapelle near Marburg, is marked with a stone (within the premises of a private farm); it was locally long believed to be haunted and is allegedly today, on certain days, the site of black rites[citation needed].