Complex sentence: Herluf Trolle converted the abbey into a manor house and estate, and before he died in 1565, he and his wife, Birgitte Mogensdatter Gøye, who was childless, founded the boarding school Herlufsholm for'youth of noble and honorable heritage'.
Split into simpler sentences: Herluf Trolle converted the abbey into a manor house and estate. He died in 1565 and his wife, Birgitte Mogensdatter Gøye, who was childless, founded Herlufsholm Boarding School for'youths of noble and honorable heritage'.