abstract:The Assize of Clarendon was an 1166 act of Henry II of England that began the transformation of English law from such systems for deciding the prevailing party in a case, especially felonies, as trial by ordeal or trial by battle or trial by compurgation to an evidentiary model, in which evidence, inspection, and inquiry was made by laymen, knights or ordinary freemen, under oath. This act greatly fostered the methods that would eventually be known in common law countries as trial by jury.