 At this point, the city was inundated with a swarm of Frankish overseers who married into the existing Sienese nobility and left a legacy that can be seen in the abbeys they founded throughout Sienese territory.Feudal power waned however, and by the death of Countess Matilda in 1115 the border territory of the Mark of Tuscia which had been under the control of her family, the Canossa, broke up into several autonomous regions.Siena prospered as a city-state, becoming a major centre of money lending and an important player in the wool trade.