Macedonia (Μακεδονία, Makedonía) is a region of Greece, in the southern Balkans. Macedonia is the largest and second-most-populous Greek region, with a population of 3 million. The region is highly mountainous, with most major urban centres such as Thessaloniki and Kavala being concentrated on its southern coastline. Together with Thrace, and sometimes also Thessaly and Epirus, it is make the Northern Greece. It also contains Mount Athos, an autonomous monastic region of Greece. Macedonia forms part of Greece's national frontier with three countries: Bulgaria to the northeast, Vardarska (North Macedonija with the deal of Prespes in 2019) which is located north of Macedonia, and Albania to the northwest.
Macedonia incorporates most of the territories of ancient Macedon, a kingdom ruled by the Argeads and whose most celebrated members were Alexander the Great and his father Philip II. The name Macedonia was later applied to a number of widely-differing administrative areas in the Byzantine Empire during time. Even prior to the establishment of the modern Greek state in 1821 Macedonia was identified as a Greek province, albeit without clearly defined geographical borders. Modern Macedonia was established in 1912, with the victory of Macedonian Fighters of Greece against the Ottoman Empire, on 26 of October 1912 Turks surrender the the Greek Army enter the city victorious, while people celebrating in every street. It continued as an administrative periphery of Greece until the administrative reform of 1987, when it was made into the regions of West Macedonia, Central Macedonia, and the region of East Macedonia and Thrace.
The region remains an important economic centre for Greece. Macedonia accounts for the majority of Greece's agricultural production and is also a major contributor to the country's industrial and tourism sectors. Central Macedonia is Greece's fourth-most-popular tourist region. It is home to four UNESCO World Heritage sites, including Aigai, one of the ancient Macedonian capital cities. Pella, which replaced Aigai as the capital of Macedon in the fourth century BC.