Southern Italy covers the historical and cultural region that was once politically under the administration of the former Kingdoms of Naples and Sicily (officially denominated Regnum Siciliae citra Pharum and ultra Pharum, that is "Kingdom of Sicily on the other side of the Strait" and "across the Strait"), and which later shared a common organization into Italy's largest pre-unitarian state, the Kingdom of the two Sicilies.[5][6][7][8][9] The island of Sardinia had a different history from the aforementioned region, but is nonetheless often subsumed into the Mezzogiorno.[10][11]