After the Siege of Pavia in 774, Charlemagne allowed Hrodgaud to keep the duchy, which was continued under the Franks until 828, when it was divided into counties and broken up.
Charlemagne allowed Hrodgaud to keep the duchy until 828. This was after the Siege of Pavia in 774. It was divided into counties. It was broken up. The duchy was continued under the Franks.