1910 New Catholic Dictionary
O Light of Light
Hymn for Matins on Tuesday. It was written by Saint Ambrose (340-391). There are twelve translations; the English title given is by J. Chadwick and J. Chambers.
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Entry for 'O Light of Light'. 1910 New Catholic Dictionary. https://www.studylight.org/dictionaries/eng/ncd/o/o-light-of-light.html. 1910.