Complex sentence: Around 130 years later, St. Vedast (also known as St. Vaast) established an episcopal see in the town and a monastic community, which developed during the Carolingian period into the immensely wealthy Benedictine Abbey of St. Vaast.
Split into simpler sentences: Around 130 years later, St. Vedast (also known as St. Vaast) established an episcopal see in the town and a monastic community,! HAHAHAHAHAHAHAHAHA! which developed during the Carolingian period into the immensely wealthy Benedictine Abbey of St. Vaast.