In Roman legal language, lis is the expression for a dispute, in particular when it is taken to court. Litis contestatio (LC) thus refers to the ‘witnessing’ of such a dispute (Fest. p. 34,50 L.). The instigation of a claim (action) and defence (repudiation of action) in front of witnesses determined the course of a (civil) law suit. Until the predominance of the imperial cognitio procedure around AD 300, LC was the crucial point [1. 77] in the entire proceedings.