Trial by ordeal
Priestly cooperation in trials by fire and water was forbidden by Pope Innocent III at the Fourth Lateran Council of 1215, and replaced by compurgation. Trials by ordeal became more rare over the Late Middle Ages, often replaced by confessions extracted under torture, but the practice was discontinued only in the 16th century. Johannes Hartlieb in 1456 reports a popular superstition for how to identify a thief by an ordeal by ingestion practiced privately without judicial sanction.