The Sub Tuum Praesidium is the oldest known hymn to Virgin Mary and is often used in Christian services as a prelude to the Litany of the Blessed Virgin Mary (also known as the Litany of Loreto). In 1944, Tolkien recommended his son Christopher to learn "the Litany of Loretto [sic] (with the prayer Sub tuum praesidium)" by heart. It was therefore logical that Tolkien created his own Quenya Litany of Loreto, which was written on the manuscript as the Ortírielyanna.
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