Question: When did Ermengarde Of Hesbaye's husband die?
Sentence (from "Ermengarde of Hesbaye"): Ermengarde (or Irmingard) of Hesbaye (c. 778 – 3 October 818), probably a member of the Robertian dynasty, was Carolingian empress from 813 and Queen of the Franks from 814 until her death as the wife of the Carolingian emperor Louis the Pious.
Relevant evidence: Yes