He marries the 13 - year - old Swabian girl Hildegard , who will bear him nine children .
Charlemagne repudiates his Lombard wife Desiderata , daughter of Desiderius , after one year of marriage .
Charlemagne marries the 13 - year - old Swabian girl Hildegard , who will bear Charlemagne nine children .
Charlemagne repudiates his Lombard wife Desiderata , daughter of Desiderius , after one year of marriage .