This book is a summary of essential points which cover the basic understanding of liturgy. It is a tool guide not only for the students who are beginning to study theology at higher levels, but also a guide for the teachers who guide their students to a higher understanding of liturgy at the theological level. This work is also a masterpiece for the pastors of souls and scholars who wish to deepen their knowledge of liturgy and theology.This work is a result of long reflection and experience in teaching in higher institutions. I hope the collected experience will be fruitful for those who use this book in their search for liturgical knowledge.