EURO-EXPERT develops a new integrated concept of cultural expertise by adopting an historiographical perspective. We look at cultural expertise in the history of law from a diachronic and synchronic perspective covering both ancient and modern times and inspiring from ethnomethodology. Our research scrutinizes the historical sequence of narratives and discourses through which cultural expertise develops in the everyday life of conflict resolution. Our findings show that the history of cultural expertise unfolds from its experimental applicability to the reasoning procedures used by historians and socio-legal scientists in order to assist decision-making authority in the assessment of evidence.