The Liturgical Constitution Sacrosantum Concilium, in calling the Church of our time to provide serious liturgical training for the clergy and the faithful, established that the teaching of scientia liturgica be conducted from both theological and historical, spiritual and pastoral aspects. and legal. The course, following the conciliar indications, offers ISR students the examination of this discipline under its multifaceted scope, not limiting it only to ecological aspects. The approach is clearly first and foremost theological because the axiom that guides the study itinerary is “every liturgical error underlies a theological error”.