Located just to the north, Sicily has provided Malta with a virtually continuous exchange of knowledge, ideas, customs and beliefs throughout history. Many modern Maltese families trace their origins to various parts of Sicily and Southern Italy. The geographic proximity has facilitated a considerable amount of intermarriage, cross-migration, and trade between the two groups of islands. It is likely that this was just as true during the period of Arab domination over Sicily as it has been since the Norman conquest of Sicily in 1060 CE. Accordingly, it is difficult to determine whether some of the Semitic influences on Maltese culture were originally imported to Malta from North Africa, or from Sicily.