 Maintaining the traditional forms and patterns of the imperial bureaucracy, the island's "iudicati", originally an administrative sub-division, had become autonomous states provinces ruled by "iudices".By the 10th century, these districts (like the provinces administered by "dux" ("Duke") and "comes" ("Count") on mainland Europe) had become hereditary or rotated amongst a few most powerful clans.The first important Giudice of Arborea was Marianus I (ruled 1060 – 1070) of the Thori family.