In ancient times, the Illyrians inhabited northern and central regions of Albania, whilst Epirotes inhabited the south. Several important ancient Greek colonies were also established on the coast. The Illyrian kingdom centered in what is now Albania was the dominant power before the Rise of Macedon. In the 2nd century BCE, the region was annexed by the Roman Republic, and after the division of the Roman Empire it became part of Byzantium. The first known Albanian autonomous principality – Arbanon – was established in the 12th century. The Kingdom of Albania, Principality of Albania and Albania Veneta were formed between the 13th and 15th centuries in different parts of the country, alongside other Albanian principalities and political entities. In the late 15th century, Albania became part of the Ottoman Empire until 1912, when the modern Albanian state declared independence. In 1939, Italy invaded the Kingdom of Albania, which became Greater Albania, and then a protectorate of Nazi Germany during World War II. Following the war, the People's Socialist Republic of Albania was formed, which lasted until the Revolutions of 1991 concluded with the fall of communism in Albania and eventually the establishment of the current Republic of Albania.