Greek Muslims in the context of "Persecution of Muslims during the Ottoman contraction"

Religion in Greece is dominated by Christianity, in particular the Greek Orthodox Church, which is within the larger communion of the Eastern Orthodox Church. It represented 81 to 90% of the total population in 2022 and is constitutionally recognized as the "prevailing religion" of Greece. Religions with smaller numbers of followers include Islam followed by different communities of Greek Muslims (now comprising only 2% of the population), Western Catholicism (comprising 1% of the population), Greek Catholicism, Judaism, Evangelicalism, Hellenic paganism, and Jehovah's Witnesses. A number of Greek atheists exist, not self-identifying as religious.

The Convention Concerning the Exchange of Greek and Turkish Populations (Greek: Σύμβαση για την Ανταλλαγή των ελληνικών και τουρκικών Πληθυσμών, romanized: Symvasi gia eis Antallagi ton ellinikon kai tourkikon Plithysmon, Turkish: Türk ve Yunan Nüfuslarının Mübadelesine İlişkin Sözleşme), also known as the Lausanne Convention, was an agreement between the Greek and Turkish governments signed by their representatives in Lausanne on 30 January 1923, in the aftermath of the Greco-Turkish War of 1919–1922. The agreement provided for the simultaneous expulsion of Orthodox Christians from Turkey to Greece and of Muslims from Greece (particularly from the north of the country) to Turkey. These involuntary population transfers involved approximately two million people, around 1.5 million Anatolian Greeks and 500,000 Muslims in Greece.

The Pontic Greeks (Pontic: Ρωμαίοι, Ρωμιοί; Turkish: Pontus Rumları or Karadeniz Rumları; Greek: Πόντιοι, Ελληνοπόντιοι), also Pontian Greeks or simply Pontians, are an ethnically Greek group indigenous to the region of Pontus, in northeastern Anatolia (modern-day Turkey). They share a common Pontic Greek culture that is distinguished by its music, dances, cuisine, and clothing. Folk dances, such as the Serra (also known as Pyrrhichios), and traditional musical instruments, like the Pontic lyra, remain important to Pontian diaspora communities. Pontians traditionally speak Pontic Greek, a modern Greek variety, that has developed remotely in the region of Pontus. Commonly known as Pontiaka, it is traditionally called Romeika by its native speakers.

The earliest Greek colonies in the region of Pontus begin in 700 BC, including Sinope, Trapezus, and Amisos. Greek colonies continued to expand on the coast of the Black Sea (Euxeinos Pontos) between the Archaic and Classical periods. The Hellenistic Kingdom of Pontus was annexed by Rome in 63 BC becoming Roman and later Byzantine territory. During the 11th century AD, Pontus was largely isolated from the rest of the Greek–speaking world, following the Seljuk conquest of Anatolia. After the 1203 siege of Constantinople by the Fourth Crusade, the Empire of Trebizond was established on the Black Sea coast by a branch of the Komnenos dynasty, later known as 'Grand Komnenos'. Anatolia, including Trebizond, was eventually conquered by the Ottomans entirely by the 15th century AD. Greek presence in Pontus remained vibrant during the early modern period up until the 20th century, when, following the Pontic Greek genocide and the 1923 population exchange with Turkey, Pontic Greeks migrated primarily to Greece and around the Caucasus, including in the country of Georgia. Although the vast majority of Pontic Greeks are Orthodox Christians, those who remained in Northeastern Turkey's Black Sea region following the population exchange are Muslim; their ancestors having converted to Islam during the Ottoman period, like thousands of other Greek Muslims.

The Muslim minority of Greece is the only explicitly recognized minority in Greece. It numbered 97,605 (0.91% of the population) according to the 1991 census, and unofficial estimates ranged up to 140,000 people or 1.24% of the total population, according to the United States Department of State.

Like other parts of the southern Balkans that experienced centuries of Ottoman rule, the Muslim minority of mainly Western Thrace in Northern Greece consists of several ethnic groups, some being Turkish speaking and some Bulgarian-speaking Pomaks, while others descend from Ottoman-era Greek converts to Islam and also Muslim Romas. While the legal status of the Muslim minority in Greece is enshrined in international law, namely the 1923 Treaty of Lausanne, which also governs the status of the "Greek inhabitants of Constantinople" (the only group of the indigenous Greek population in Turkey that was exempt from forced expulsion under the Convention Concerning the Exchange of Greek and Turkish Populations, along with that of the islands of Imbros and Tenedos under Article 14 of the Treaty), precise definitions pertaining thereto and scope of applicability thereof remain contested between the two countries.

The Cretan Muslims or Cretan Turks (Greek: Τουρκοκρητικοί or Τουρκοκρήτες, Tourkokritikí or Tourkokrítes; Turkish: Giritli, Girit Türkleri, or Giritli Türkler; Arabic: أتراك كريت) were the Muslim inhabitants of the island of Crete. Their descendants settled principally in Turkey, the Dodecanese Islands under Italian administration (part of Greece since 1947), Syria (notably in the village of Al-Hamidiyah), Lebanon, Palestine, Libya, and Egypt, as well as in the larger Turkish diaspora.

Cretan Muslims were descendants of ethnic Greeks who had converted to Islam after the Ottoman conquest of Crete in the seventeenth century. They identified as Greek Muslims, and were referred to as "Turks" by some Christian Greeks due to their religion; not their ethnic background. Many Cretan Greeks had converted to Islam in the wake of the Ottoman conquest of Crete. This high rate of local conversions to Islam was similar to that in Bosnia-Herzegovina, Albania, parts of western Greek Macedonia (such as the Greek Muslim Vallaades), and Bulgaria; perhaps even a uniquely high rate of conversions rather than immigrants. The Greek Muslims of Crete continued to speak Cretan Greek. European travellers' accounts note that the "Turks" of Crete were mostly not of Turkic origin, but were Cretan converts from Orthodoxy.

The Vallahades (Greek: Βαλαχάδες) or Valaades (Greek: Βαλαάδες) are a Greek-speaking Muslim population who lived along the river Haliacmon in southwest Greek Macedonia, in and around Anaselitsa (modern Neapoli) and Grevena. They numbered about 17,000 in the early 20th century. They are a frequently referred-to community of late-Ottoman Empire converts to Islam, because, like the Cretan Muslims, and unlike most other communities of Greek Muslims, the Vallahades retained many aspects of their Greek culture and continued to speak Greek for both private and public purposes. Most other Greek converts to Islam from Macedonia, Thrace, and Epirus generally adopted the Ottoman Turkish language and culture and thereby assimilated into mainstream Ottoman society.

European Islam, or Euro-Islam, is a hypothesized new branch of Islam that historically originated and developed among the European peoples of the Balkans (primarily Albania, Bosnia and Herzegovina, Kosovo, and European Turkey, but also in Bulgaria, Montenegro, and North Macedonia, countries with sizable Muslim minorities). These communities, alongside those in some republics of Russia, constitute a large population which constitute large populations of European Muslims. Historically significant Muslim populations in Europe include Azerbaijanis, Ashkali and Balkan Egyptians, Balkan Turks, Bosniaks, Böszörmény, Chechens, Circassians, Cretan Turks, Crimean Tatars, Gajals, Gorani, Greek Muslims, Ingush, Khalyzians, Kazakhs, Lipka Tatars, Muslim Albanians, Muslim Romani people, Pomaks, Torbeshi, Turks, Turkish Cypriots, Vallahades, Volga Tatars, Yörüks, and Megleno-Romanians from Notia today living in East Thrace, although the majority are secular.

The terms "European Islam" and "Euro-Islam" were originally introduced at a conference that took place in Birmingham in 1988, presided by Carl E. Olivestam, senior lecturer at Umeå University, and subsequently published in the Swedish handbook Kyrkor och alternativa rörelser ("Churches and Alternative Movements"). "European Islam" defines the ongoing debate on the social integration of Muslim populations in Western European countries such as France, Germany, the United Kingdom, and the Netherlands. There are three Islamic scholars who participate in the debate on "Euro-Islam": Enes Karić, Bassam Tibi, and Tariq Ramadan, who adopted the term in the second half of the 1990s but use it with different meanings. The foremost Western, Non-Muslim scholars of political science and/or Islamic studies involved in the debate on "Euro-Islam" are Jocelyne Cesari, Jørgen S. Nielsen, and Olivier Roy.