Christian initiation. Beginnings -- Syria and Egypt -- Rome and North Africa - The fourth-century synthesis -- From adult to infant baptism -- Eucharist. Sacred meal -- Anamnesis and epiclesis: the eucharistic prayer -- Holy food -- "The bloodless sacrifice" -- "Let all mortal flesh keep silence" -- Liturgical time. Daily prayer -- Sunday -- Easter and Pentecost -- Christmas, Epiphany and Lent -- Saints’ days