The tune of "O Sanctissima" has been notably reused in the first half of a American civil rights anthem that is most commonly attributed as having descended lyrically from what hymn?
O Sanctissima: "O Sanctissima " (O most holy) is a Roman Catholic hymn in Latin, seeking the prayers of the Blessed Virgin Mary, and often sung in various languages on her feast days. We Shall Overcome:  The song is most commonly attributed as having descended lyrically from "I'll Overcome Some Day", a hymn by Charles Albert Tindley that was first published in 1900.
i don't know