Complex sentence: In the left aisle is the tomb of Aberada or Alberada of Buonalbergo, who married Robert Guiscard in 1053 but was repudiated by him for the Lombard princess Sichelgaita of Salerno.
Split into simpler sentences: In the left aisle is Tomb of Alberada of Buonalbergo, wife of Robert Guiscard. She married Robert in 1053 but was rejected by him for the Lombard princess Sichelgaita of Salerno.