1.5% (2,369), others 0,9% (1,243). The area ceded to the Entente also included Karaagach and its environs, which became part of Turkey after the Treaty of Lausanne. Western Thrace was ceded to the Entente in December 1919, after which many Bulgarians left the region, while many Greeks moved in. The Government of the Entente (led by French general Sharpe) held its own census in 1920, according to which Western Thrace had a population of 204,700, of whom: Turks 36.5% (74,720 Muslims), Bulgarians 32.2% (65,927 = 54,079 Christians and 11,848 Muslims), Greeks 27.4% (56,114 Christians), Jews 1.5% (2,985) Armenians 0.9% (1,880), others 3,066. At the time this census was conducted, a part of the Greek population of Ksanthi, who left massively the Ksanthi district after the Balkan wars (1913), returned. According to the Turkish researches the population of Western Thrace in 1923 was 191,699, of whom 129,120 (67%) were Turks/Muslims (also includes the Pomaks) and 33,910 (18%) were Greeks; the remaining 28,669 (15%) were mostly (Christian) Bulgarians, along with small numbers of Jews and Armenians (before the population exchange). The population of the region, according to the official census of 1928 and 1951 conducted by the local authorities, per mother tongue, was as follows: Miscellaneous Abdera, an ancient Greek coastal town in the regional unit of Xanthi is the birthplace of the Greek philosophers Democritus, considered by some the father of the atomic theory, and Protagoras, who is credited with having invented the role of the professional sophist or teacher of "virtue". Thrace and in particular the Rhodope mountains, its northern mountainous part, is home to one of the two surviving brown bear (species Ursus arctos) populations in Greece (the other is in the Pindus mountains, in central Greece). The Greek-Turkish border is a major entering point of illegal immigrants from Asia (Syrians, Kurds, Afghans, Pakistanis) trying to enter Europe. See also Northern Thrace Eastern Thrace Thrace Thracians List of Thracian Greeks Turks of Western Thrace Pomaks Muslim minority of Greece Provisional Government of Western Thrace Eastern Macedonia and Thrace Democritus University of Thrace References Bibliography . External links Region of Eastern Macedonia and Thrace Combined Prefectural Authority of Drama, Kavala and Xanthi Combined Prefectural Authority of Rhodope and Evros Prefecture of Xanthi Thrakiki.gr Prefecture of Rhodope Prefecture of Evros Democritus University of Thrace Municipality of Feres Northern Greece