Complex sentence: The buildings along with a granite chapel were donated for the establishment of a Benedictine monastery during the reign of King Swein Estridsen, who gifted the old manor on which the abbey was to be built and two and a half other rented properties to fund its construction.
Split into simpler sentences: The buildings along with a granite chapel were given for the establishment of a Benedictine monastery during the reign of King Swein Estridsen. Estridsen gave the old manor on which the abbey was to be built and two and a half other rent properties to fund its construction.