Question: Were the Psalms in Handel's Messiah modified by Elizabeth I?, Answer:Yes, Description of Messiah (Handel): Oratorio by Handel, Fact1: The Psalms is Handel's Messiah are taken from the Book of Common Prayer., Fact2: The Book of Common Prayer was modified by Elizabeth I in 1559.
Step1: The Psalms in Handel's Messiah are found in which book?, Step2: Did Elizabeth I modify #1?, Wikipedia page for step 1: Messiah (Handel), Wikipedia page for step 2: Book of Common Prayer, not_definitive_answer: False, incorrect_answer: False