Anachronisms: While their fellow-prisoner is being crucified, the priests are singing the hymn "Pange, lingua, gloriosi" by Thomas Aquinas (1264). However, they are singing a German version of this song, which was not in use before 1969. In addition, even if they happened to know a German version, it would be more likely for them to sing the original Latin version, as there were priests from all over Europe imprisoned in this block.
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