|Stained Glass in Melkite Catholic Church, Roslindale - Courtesy Wikipedia|
To Christ the Lord of Worlds We Sing is written by Walter H. Shewring (1906–1990). In the Divine Office (1974) it is sung at Morning Prayer on the Solemnity of Christ the King. For it's musical setting, the Office recommends the tune: Deus Tuorum Militum (Grenoble), first published in the Grenoble Antiphoner of 1753. An alternative tune that can also be used is Winchester New, as featured in the following video.
Alternative Tune: Winchester New