Dean.--An Ecclesiastical title; the presiding officer of a Cathedral. The word is derived from the Latin _decanus_, meaning one presiding over ten. In England the Dean is a Church dignitary and ranks next to the Bishop. The word is used in the American Church, but with a considerable modification of its original meaning. The Cathedral in the American Church not having become fully developed, the duties and rights of the Dean as the presiding officer of the Cathedral have not been fully determined, or at all events not made a reality. So that for the most part the title as used in this country is simply honorary. Decalogue.--The name given to the Ten Commandments and derived from the Greek word, _dekalogos_, meaning the Ten Words or discourses. They are divided into two tables; the first four commandments set forth our duty towards God, and the last six our duty towards man. The reading of the Ten Commandments in the Communion Office is peculiar to our Liturgy and were added in the year 1552, together with the response after each commandment, "Lord, have mercy upon us and incline our hearts to keep this law." While the commandments were originally introduced to our Liturgy as a warning and safeguard against the lawlessness of extreme Puritans, they are, nevertheless, helpful to all as a preparation for the right reception of the Holy Communion; leading the congregation to an examination of their "lives and {78} conversation by the rule of God's commandments." The translation of the Decalogue used in the Communion Office is not that of the present Authorized version, but that of the "Great Bible" of 1539-40, which was retained because the people had grown familiar with it. To the Commandments is added our Lord's Summary of the Law, which may be read at the discretion of the Minister. Decani.--A term used to designate the south side of the choir, (the right side as we face the Altar) that being the side where the Dean sits. Dedication, Feast of.--The annual commemoration of the consecration of a Church building is so called. From ancient authors we learn that when Christianity became prosperous and flourishing, churches were everywhere erected and were solemnly consecrated, the dedications being celebrated with great festivities and rejoicing. The rites and ceremonies used upon these occasions were a great gathering of Bishops and others from all parts, the celebration of divine offices, singing of hymns and psalms, reading the Holy Scriptures, sermons and orations, receiving the Blessed Sacrament, prayers and thanksgivings, liberal alms bestowed on the poor, gifts to the Church; and, in short, mighty expressions of mutual love and kindness and universal rejoicing with one another. These dedications from that time forward were always commemorated once a year and were solemnized with great pomp and much gathering of the people, the solemnity usually lasting eight days.