"Gertrude of Nivelles, O.S.B. (also spelled Geretrude, Geretrudis, Gertrud; c. 628 – March 17, 659) was a 7th-century abbess who, with her mother Itta, founded the ...
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Abbey of Nivelles located in present-day Belgium." - (en.wikipedia.org 05.11.2019)
