Question: The Song of Iowa is set to the tune of what German Christmas Song?
Sentence (from "O Sanctissima"): The tune has been notably reused for the German Christmas carol "O du fröhliche" (O, how joyful), the English recessional hymn "Lord, Dismiss Us With Thy Blessing", and the first half of the American civil rights anthem "We Shall Overcome".
Relevant evidence: No