Pepin II d'Héristal, Mayor of the Palace of Austrasia - Alternative Data After Merges

It should be Liege, in Belgium.
"Pépin II de Herstal, dit Pépin d'Héristal, Pépin le Gros ou encore Pépin le Jeune1 (né vers 645 - mort le 16 décembre 714 à Jupille-sur-Meuse), est maire du palais d'Austrasie. Il est le fils d'Ansegisel (lui-même fils d'Arnoul de Metz), et de Begge d'Andenne, fille de Pépin Ier Le Vieux."
Louis the Pious could be the only one that was burried in Saint-Arnoul, Metz because it was the burial place for the woman in the Carolingian dynasty.
http://www.persee.fr/web/revues/home/prescript/article/medi_0751-27...

Thanks for that Ulf. I don't read French, but what you say sounds valid. I'll change it. I appreciate your response.

The Find-A-Grave source for his burial place that is presently on GEni, seems to be for Charles Martel, not Pepin - unless I'm missing something. I've removed it

Cross referencing to this Disussion too - http://www.geni.com/discussions/116668