A letter attributed to Nicholas Mystikos by Christian Settipani mentions negotia...

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A letter attributed to Nicholas Mystikos by Christian Settipani mentions negotiations to betroth the second daughter to Louis the Blind. Whether negotiations were ever completed and whether the marriage ever occurred is not known. However Settipani and other genealogists consider Charles Constantine of Vienne to be the result of this marriage. Footnote at Wikipedia, Ermengard of Italy. https://en.wikipedia.org/wiki/Ermengard_of_Italy. Accessed Jan 15, 2016.

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