This handbook, in five volumes, represents a complete course of liturgical studies which the Pontifical Liturgical Institute offers to professors and students of liturgy in universities and seminaries and to other persons engaged in liturgical ministry. It is offered as model, source, and reference. This fourth volume opens with a review of the basic liturgical notions of sacraments and sacramentals. The seven sacraments are then examined according to their classical order: Christian initiation, comprising the catechumenate, baptism, confirmation, and first Eucharist; reconciliation; the care and anointing of the sick; holy orders and liturgical ministries; and marriage. Next are the sacramentals, namely, monastic and religious profession; consecration of virgins; funeral rites; and the various blessings.