Complex sentence: William de Percy ordered that a new abbey to be built (1078) by Regenfrith (Reinferd) a soldier monk, dedicating it to St. Peter and St. Hilda.
Split into simpler sentences: William de Percy ordered that a new abbey to be built on the site. It was built (1078) by Regenfrith (Reinferd) a soldier monk, dedicating it to St. Peter and St. Hilda.