A short expression of praise to the Trinity from the very early Church. Authors such as Hippolytus (d. 235) and Origen (ca 231) It is used extensively in the Mass, the Divine Office, and also many other devotions such as the Rosary.
GLORY be to the Father, and to the Son, and to the Holy Spirit. As it was in the beginning, is now, and will be forever. Amen.
GLORIA Patri, et Filio, et Spiritui Sancto. Sicut erat in principio, et nunc, et semper, et in saecula saeculorum. Amen.