Many Romance linguists consider it the language that, together with Italian, is closest to Latin among all its genealogical descendants. However, it has also incorporated elements of a Pre-Latin (mostly Paleo-Sardinian and, to a much lesser degree, Punic) substratum, as well as a Byzantine Greek, Catalan, Spanish and Italian superstratum. These elements of the language originate in the political history of the island of Sardinia: before the Middle Ages, it was for a time a Byzantine possession; then, after a significant period of self-rule with the judicates, it came during the late Middle Ages into the Iberian sphere of influence; and finally, from the 18th century onward, under the Italian one.