St Jerome, Priest and Doctor
Jerome was born at Stridon, in Dalmatia, and was baptized in Rome. He was educated at a school held by very distinguished professors. Ordained priest, he retired into a monastery founded by two great Roman ladies, St. Paula and St. Eustochium, at Bethlehem, near the crib in which our Lord was born. Mortifying himself by perpetual abstinence, and devoting himself to meditation of the Scriptures (Gradual), he spent days and nights in study and writing. It is he who fixed the Latin text in the translation known as the Vulgate which the Church adopted as the official translation of the Bible. He died in A.D. 420 and his body rests in Rome in the church of St. Mary Major.
In medio Ecclesiae aperuit os ejus: et implevit eum Dominus spiritu sapientiae et intellectus: stolam gloriae induit eum. * Bonum est confiteri Domino: et psallere nomini tuo, Altissime.
In the midst of the Church the Lord opened his mouth: and He filled him with the spirit of wisdom and understanding: He clothed him with a robe of glory. * It is good to give praise to the Lord: and to sing to Thy name, O most High.
(Ecclesiasticus 15:5 and Psalm 91:2 from the Introit of Mass)
Deus, qui Ecclesiae tuae in exponendis sacris Scripturis beatum Hieronymum Confessorem tuum, Doctorem maximum providere dignatus es: praesta, quaesumus; ut, ejus suffragantibus meritis, quod ore simul et opere docuit, te adjuvante exercere valeamus.
O God, who for the expounding of Holy Scripture, didst raise up in Thy Church the great and holy doctor Jerome; grant, we beseech Thee, that, through his intercession and merits, we may put in practice what both by word and by work he has taught us.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/08341a.htm