A traditional Catholic prayer
Glory be to the Father, and to the Son, and to the Holy Spirit. As it was in the beginning, is now, and ever shall be, world without end. Amen.
Gloria Patri, et Filio, et Spiritui Sancto. Sicut erat in principio, et nunc, et semper, et in saecula saeculorum. Amen.
The Father, crowned, holds the Cross with the Son upon it, the Dove shines above them, and the saints crowd in on both sides to look. The prayer is the lesser doxology, said at the end of every psalm in the Divine Office except in times of mourning: it is left out in the last three days of Holy Week and in the Office of the Dead. The Synod of Vaison in 529 ordered its second half, “As it was in the beginning”, to be said in Gaul, noting that Rome, the East and Africa already said it against the Arians. Three lines, and all that crowd behind them, at the end of every psalm and of yours.
Adrian Fortescue, “Doxology”, The Catholic Encyclopedia, vol. 5 (1909): newadvent.org


