This holy pope is believed to have been the same Urban who baptized Valerian, husband of St. Cecilia, Tiburtius, brother of Valerian, and Maximus, their gaoler, whom we honoured on April 14th. St. Urban was martyred in 230.
Protexisti me, Deus, a conventu malignantium, alleluja: a multitudine operantium iniquitatem, alleluja, alleluja. * Exaudi, Deus, orationem meam cum deprecor: a timore inimici eripe animam meam.
Thou hast protected me, O God, from the assembly of the malignant, alleluia: from the multitude of the workers of iniquity, alleluia, alleluia. * Hear, O God, my prayer, when I make supplication to Thee: free my soul from the fear of the enemy.
(Psalm 63:3,2 from the Introit of Mass)
Da, quaesumus, omnipotens Deus: ut, qui beati Urbani Martyris tui atque Pontificis solemnia colimus, ejus apud te intercessionibus, adjuvemur.
Grant, we beseech Thee, O almighty God, that we who keep the festival of blessed Urban, Thy martyr and bishop may be helped by his intercession with Thee.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/15209a.htm