pax
... that the order in which Mass-goers kissed the pax led to disputes and sometimes violence in the Middle Ages?
... that the order in which <a href="./Mass_(liturgy)" id="mwAc0" rel="mw:WikiLink" title="Mass (liturgy)">Mass</a>-goers kissed the <b id="mwAc4"><a href="./Pax_(liturgical_object)" id="mwAc8" rel="mw:WikiLink" title="Pax (liturgical object)">pax</a></b> led to disputes and sometimes violence in the Middle Ages?