51 "It was through these men, O Rome, that the light of Christ's gospel shone upon you... It was they who promoted you to such glory, making you a holy nation, a chosen people, a priestly and royal state, the capital of the world through Peter's holy See. By the worship of God you gained a wider empire than you did by earthly government. For although your boundaries were extended by your many victories and you stretched your rule over land and ocean, yet your labors in war gained you less subjects than have been won for you by the peace of Christ." (46)
Source: Aeterna Dei Sapientia (Vatican.va)