The Albanians (; ) are an ethnic group and nation native to the Balkan Peninsula who share a common Albanian ancestry, culture, history and language. They primarily live in Albania, Kosovo, North Macedonia, Montenegro, Serbia as well as in Croatia, Greece, Italy and Turkey. They also constitute a large diaspora with several communities established across Europe, the Americas and Oceania. Albanians have Paleo-Balkanic origins. Exclusively attributing these origins to the Illyrians, Thracians or other Paleo-Balkan people is still a matter of debate among historians and ethnologists. The first certain reference to Albanians as an ethnic group comes from 11th century chronicler Michael Attaleiates who describes them as living in the theme of Dyrrhachium. The Shkumbin River roughly demarcates the Albanian language between Gheg and Tosk dialects. Christianity in Albania was under the jurisdiction of the Bishop of Rome until the 8th century AD. Then, dioceses in Albania were transferred to the patriarchate of Constantinople. In 1054, after the Great Schism, the north gradually became identified with Roman Catholicism and the south with Eastern Orthodoxy. Inhabiting the west of Lake Ochrida and the upper valley of the Shkumbin River, the Albanians established the Principality of Arbanon in 1190 with the capital in Krujë. The Albanian diaspora has its roots in migration from the Middle Ages initially across Southern Europe and eventually across wider Europe and the New World. Between the 13th and 18th centuries, sizeable numbers migrated to escape various social, economic or political difficulties. One population, the Arvanites, settled in Southern Greece between the 13th and 16th centuries. Another population, the Arbëreshë, settled across Sicily and Southern Italy between the 11th and 16th centuries. Smaller populations such as the Arbanasi settled in Southern Croatia and pockets of Southern Ukraine in the 18th century. By the 15th century, the expanding Ottoman Empire overpowered the Balkan Peninsula, but faced successful rebellion and resistance by the League of Lezhë, a union of Albanian principalities led by Gjergj Kastrioti Skanderbeg. By the 17th and 18th centuries, a substantial number of Albanians converted to Islam, which offered them equal opportunities and advancement within the Ottoman Empire. Thereafter, Albanians attained significant positions and culturally contributed to the broader Muslim world. Innumerable officials and soldiers of the Ottoman State were of Albanian origin, including more than 40 Grand Viziers, and under the Köprülü, in particular, the Ottoman Empire reached its greatest territorial extension. Between the second half