O King of the gentiles and their desired One, the cornerstone that makes both one: come, and deliver man, whom you formed out of the dust of the earth.
O Rex Gentium (O King of the Gentiles) is the companion of O Key of David. Key of David is Jesus’s rightful place on the throne of David, and the role as Messiah that title speaks of. O King of the gentiles is the other half that places him a universal King. Universal is Catholic. It is that Kingship that unites all that has been divided, and that which brings peace to the world. It allows people to sing Joy to the world, the Lord has come. An undivided kingdom is one that allows for peace. It is a kingdom united under God and obedient to Gods laws, and not mans whims.