Decentralized Administration of Macedonia and Thrace municipalities and regions, in this case the 60 municipalities of Central Macedonia and of Eastern Macedonia and Thrace, and the two regions themselves. Covering an area of "Macedonia and Thrace" is the largest of the seven decentralized administrations by area, and with an overall population of it is also the second most populated one, following the Decentralized Administration of Attica. In the revised European NUTS nomenclature, the two regions of "Macedonia and Thrace" together with the two regions of the Decentralized Administration of Epirus and Western Macedonia form the first level NUTS region EL5 (Voreia Ellada). The Decentralized Administration is
Albanian-speakers of Western Thrace while Muslims were categorised alongside Turks. Among this population, Orthodox Albanians in Eastern Thrace resided in partly homogeneous communities, either villages or neighborhoods, and were mainly descendants of immigrants from the Korça region. At the conclusion of the Greco-Turkish War of 1919–1922, Greece and Turkey signed the Treaty of Lausanne, which included a population exchange between the two countries. The treaty used religion as the indicator of national affiliation, thus including populations without ethnic provisions, even Albanians, in the population exchange. Under this treaty the Muslims of Greece were exchanged with the Christians of Turkey, with an exception of the