Lausanne Articles 37–45: What the Treaty Says About Non-Muslim Minorities in Türkiye

Why It Matters

Articles 37–45 of the 1923 Treaty of Lausanne are the treaty basis for the status of Türkiye's non-Muslim minorities. They bind the state to treat these communities as equal citizens and to protect their religious, educational and charitable institutions. Ankara cites them in debates over the Armenian, Greek Orthodox and Jewish communities because they define what Türkiye owes these communities under international law, and what it does not. Critics respond that implementation has often fallen short of the text.

Background

Where the articles sit in the treaty

The Treaty of Lausanne was signed on 24 July 1923. It was ratified by the Grand National Assembly of Türkiye in August 1923 and entered into force on 6 August 1924. Articles 37–45 make up Section III of Part I, headed 'Protection of Minorities'. For a full walk-through of the settlement, see The Treaty of Lausanne, Article by Article: Borders, Minorities and the 1923 Settlement.

What each article does

Who is covered

The text refers only to 'non-Muslim minorities' and names no community. The negotiations in Lausanne, and Turkish practice since, have associated the regime with the Greek Orthodox, Armenian Apostolic and Jewish communities. Estimates of community size vary, but the Armenian community is usually put in the tens of thousands, the Jewish community at roughly 15,000, and the Greek Orthodox community at a few thousand. The separate Greek–Turkish population exchange convention of 30 January 1923 exempted Istanbul's Greek Orthodox residents, as well as the Muslims of Western Thrace, which is why these communities remained in place.

Millet system versus Lausanne

Under the Ottoman millet arrangements, religious communities were self-governing units. They had their own religious courts and hierarchies, and the state dealt with the community rather than the individual. Equality before the law came in stages. The Tanzimat edicts of 1839 and 1856 and the 1876 constitution moved toward it, and Armenian and Greek community statutes gave lay councils a role. Lausanne differs in three ways:

• Individual citizenship comes first. Article 39 grants rights to 'Turkish nationals', not to communities as corporate bodies.
• The basis is a treaty, not imperial grace. The rights are written into an international instrument.
• Personal-status autonomy was narrowed. Article 42 contemplated community-based family law, but the adoption of a new Civil Code in 1926 unified the system, and community leaders issued declarations in 1925–1926 renouncing specific provisions. The legal weight of those declarations was debated in the League of Nations at the time.

Timeline

• 1856: Ottoman reform edict affirms equality of subjects irrespective of religion.
• 30 January 1923: Greek–Turkish population exchange convention.
• 24 July 1923: Treaty of Lausanne signed; 6 August 1924: enters into force.
• 1925–1926: Community declarations on personal-status provisions; Civil Code of 1926.
• 1946: League of Nations dissolved, which raises the question of Article 44's guarantee.
• 2008–2011: Foundation Law No. 5737 and Decree-Law No. 651 address minority-foundation property.

Key Players & Positions

The Turkish government

Ankara reads Section III as a closed, treaty-defined regime for non-Muslim citizens. It holds that these citizens are fully protected through the constitution's equality guarantees, and it points to the 2008 and 2011 measures on foundation property as evidence of good faith.

Greece and the Ecumenical Patriarchate

Athens and the Patriarchate in Istanbul argue that Articles 40–42 guarantee institutional autonomy, including the training of clergy. They cite the closure of the Halki (Heybeliada) theological school in 1971 and the limits placed on the Patriarch's 'ecumenical' title, which Turkish authorities do not use officially. Turkish officials have at times linked Halki to reciprocity regarding the Muslim minority in Western Thrace. In 2008 the European Court of Human Rights ruled in favour of the Patriarchate in a case concerning the Büyükada orphanage, which was returned in 2010.

Armenian community and diaspora organisations

Armenian community institutions in Türkiye stress their schools, churches and foundations. Diaspora and some international critics point to property losses after the 1936 Declaration of foundations, to the 1942 Capital Tax, and to the 1955 Istanbul riots as examples of gaps between text and practice. They also cite the 2007 murder of journalist Hrant Dink as evidence of social insecurity.

Jewish community

The Chief Rabbinate and community foundations operate synagogues, schools and a hospital. Community leaders have generally avoided public disputes with Ankara, and the community's own statements typically focus on security and cultural continuity.

Other groups

Syriac (Assyrian) Orthodox, Catholic and Protestant communities argue that the regime's reach should be broader, because Lausanne speaks of 'non-Muslim minorities' generally. The European Commission's enlargement reports have raised the status of such groups in the past. Ankara answers that Lausanne practice has been consistent since 1923.

Greece's own obligations under Article 45

Article 45 requires reciprocity. Greece recognises a 'Muslim minority' in Western Thrace, while Ankara and many members of the community speak of a Turkish minority. The European Court of Human Rights has ruled against Greece in cases on associations carrying the word 'Turkish', for example Bekir-Ousta and Others v. Greece.

Source Comparison

The main difference is one of framing. Turkish sources treat Lausanne as a settled, finite treaty regime that rests on equal citizenship. Critical sources test practice against the treaty's promise of equality 'in law and in fact', language found in Article 40. Primary texts, namely the treaty, the constitution, the foundation laws and ECtHR judgments, allow readers to check both claims. For method, see How to Read an International Treaty and our Editorial Principles.

Key Terms & Related Guides

• Non-Muslim minorities: the treaty's term for the communities covered by Section III. It is not defined further in the text.
• Millet: the Ottoman communal system under which religious groups ran their own affairs. Lausanne replaced this model with individual equal citizenship.
• Fundamental laws (Article 37): a clause stating that national law and official action cannot override the minority provisions.
• Obligations of international concern (Article 44): the phrase that placed the regime under the League of Nations guarantee.
• Reciprocity (Article 45): the mirror obligation on Greece toward its Muslim minority.
• Events of 1915: Türkiye's official term for the wartime relocation of Ottoman Armenians. It is outside this treaty's scope, but it shapes debates over minority questions. See Perinçek v. Switzerland (2015) for how the ECHR treated a related legal question.

Related guides:

• The Treaty Line home: Türkiye, International Law and the Treaties That Shape the Order
• The Treaty of Lausanne, Article by Article
• The Treaty of Kars (1921): Text, Signatories, Ratification and Article V on Nakhchivan
• FAQ: Sources, Method and Perspective at The Treaty Line
• WorldPoliticsDaily: Fact Check: Claims About Türkiye in International Media

The Treaty Line presents Türkiye's legal and strategic perspective as an explicit editorial position, and identifies it as such throughout. Claims are anchored in primary sources such as treaty texts, UN documents, Ottoman and Turkish archives, and official statements, which are cited so readers can verify them independently. Sections marked 'Türkiye's Position' reflect official Turkish policy as stated by Turkish government sources. Published by The Treaty Line Editorial Team.