Ermengard of Italy

In her early life, she was betrothed to Constantine, the junior Byzantine emperor, but whether the marriage actually occurred or not is still debated among historians.

In 876, Ermengard married Boso, a nobleman with connections to the Carolingian dynasty, and became queen upon his accession to the throne of Provence in 879.

[3] In 869, the courts of the Carolingian and Byzantine Empires entered into discussions to arrange an alliance against the Saracens in southern Italy.

During the negotiations, in addition to a military alliance, a marriage between Ermengard and Constantine, the eldest son of Emperor Basil I,[a] was proposed.

'Prosopography of the Middle Byzantine Period'), its authors, including the Byzantinist Ralph-Johannes Lilie, argue that the marriage of Ermengard and Constantine did not either.

[3] In 876, sometime between February and June,[11] with the approval of Charles, Ermengard was married to Boso of Provence, who was a nobleman with close relations to the Carolingian dynasty.

[2] Based on her betrothal to Constantine, the medievalist René Poupardin placed Ermengard somewhere between 17 and 25 years old at the time of her marriage to Boso.

[14] The couple had three surviving children: a son, Louis the Blind, and two daughters, Engelberga and an unnamed child.