The Psalms are among the best known and best liked texts of the Old Testament, even the whole Bible. First, this course will present a general introduction to the Psalms (Name, Place in the canon, Content, Division, Order, Poetic techniques, Titles, Literary genres). Then the course will show how the Psalms were used in the Roman Catholic Liturgy along the centuries, both in the Liturgy of the Hours and the Eucharist. The difference between the scientific exegesis of the first part and the liturgical exegesis of the second part will be studied. Indirectly, since Catholic liturgy has been in Latin for centuries, this course will also be a crash course of Latin.