 His son Peter I and grandson Hugh I finally divided the "kingdom" by the Treaty of Oristano (1192), but in the end Hugh's line, the House of Cervera (or Bas), succeeded in establishing themselves.While Peter II, son of Hugh, has been accused by historians of impoverishing his realm of glory, his son Marianus II expanded it substantially, even ruling over a majority of the island.During the final decades of the 13th century, three other "giudicati" fell into the hands of either Pisa or Genoa or one of their great families, but Arborea remained independent.