The
Count of Rennes was originally the ruler of the
Romano-
Frankish civitas of
Rennes. From the middle of the ninth century these counts were
Bretons with close ties to the
Duchy of Brittany, which they often vied to rule. From 990 the Counts of Rennes were usually Dukes of Brittany. In 1203 the county was integrated into the ducal
demesne.