In the present edition of the Psalterion (Psalter), the base text was the one edited by the late Professor of the Theological School in Athens, Panayiotis Bratsiotis and is being published even today with the approval of the Holy Synod of the Orthodox Church of Greece. With the edition of this volume the trilogy of the liturgical publications prepared by the Hellenic Bible Society is being completed. This trilogy comprises also of the Eclogadion (Lectionary) which contains the original text and today’s Greek translation of the liturgical New Testament readings throughout the liturgical year, and the Prophetologion which is the Old Testament readings (excluding the Psalms).