This chapter considers two case studies to visualize particular liturgical moments by identifying the architectural sites for singing specific chants. The first case study analyses the processions for the feasts of the Purification of the Virgin and Palm Sunday in the eleventh-century abbey of Saint-Benigne in Dijon, France. The second concentrates on the Palm Sunday procession in front of the thirteenth-century facade of the church of secular canons of St Andrew in Wells, England. Saint-Benigne's various successive customaries provide evidence about the liturgy practised in the church which survived with only a few modifications until the end of the thirteenth century. According to the first customary, the children sang the Gloria laus at the gate of the fortress in Dijon. The sequence of Saint-Benigne's various customaries, considered in conjunction with its architecture, permits one to observe continuity and change in ritual performance.