In-Depth Analysis· Treaty of Lausanne minority provisions articles 37-45

What Does the Treaty of Lausanne Say About Minorities? Articles 37–45 and Their Application

Treaty of Lausanne minority provisions articles 37-45 explained: who is covered, what the text guarantees, and how Greece, Armenia and Europe read it.

TAP

By Treaty And Precedent Editorial Team

Published: October 27, 2026

⏱ 9 min read (1,911 words)

Executive Summary & Key Facts

Articles 37–45 form Section III of the Treaty of Lausanne (24 July 1923) and protect Turkish nationals belonging to non-Muslim minorities on the basis of equal citizenship, not as a separate political entity.
Article 39 guarantees non-Muslim minority members the same civil and political rights as Muslims, and Article 40 guarantees equal treatment 'in law and in fact' plus the right to run their own schools, charitable and religious institutions.
Article 45 is the reciprocity clause: the rights granted to non-Muslims in Türkiye are to be conferred by Greece on the Muslim minority in its territory.
The League of Nations guarantee in Article 44 lapsed with the League's dissolution in 1946, so disputes over implementation now run through domestic courts, bilateral diplomacy and bodies such as the European Court of Human Rights.
The main interpretive disputes concern who counts as a protected 'non-Muslim minority', whether Lausanne is a ceiling or a floor for rights, and how far reciprocity with Western Thrace conditions practice.

Why It Matters

Articles 37–45 of the Treaty of Lausanne (signed 24 July 1923) are the minority-protection section of the treaty that founded modern Türkiye's international legal status. They protect Turkish nationals belonging to non-Muslim minorities through equal civil and political rights, freedom of religion, language use, and the right to run their own schools and charitable institutions. They also contain a reciprocal clause for the Muslim minority in Greece, which is why the section is still cited in Greek–Turkish, Armenian and European debates today.

Background

What the text says

Section III of Lausanne (titled “Protection of Minorities”) is short and can be read in full in a few minutes. The key operative content is below.

Article	Core content
37	Türkiye recognises Articles 38–44 as fundamental laws; no law, regulation or official action may conflict with them or prevail over them.
38	Full protection of life and liberty for all inhabitants without distinction of birth, nationality, language, race or religion; free exercise of any creed, subject to public order and good morals; freedom of movement and emigration.
39	Non-Muslim minority nationals enjoy the same civil and political rights as Muslims; religion is no bar to public employment, honours or professions; no restriction on use of any language in private life, commerce, religion, the press or public meetings; facilities for oral use of their language before courts.
40	The same treatment and security “in law and in fact” as other nationals; equal right to establish, manage and control, at their own expense, charitable, religious and social institutions and schools, using their own language.
41	Primary-school instruction in the minority's own language in towns and districts with a considerable non-Muslim population (teaching of Turkish may be made obligatory); an equitable share of public funds for educational, religious and charitable purposes.
42	Family law and personal status to be settled in line with minority customs through joint commissions; protection of churches, synagogues, cemeteries and pious foundations.
43	No compulsion to act against faith or religious observance; weekly rest days respected, without exempting minority members from public-order obligations.
44	Provisions are obligations of international concern placed under League of Nations guarantee; modification requires a majority of the League Council; disputes may be referred to the Permanent Court of International Justice.
45	The same rights are to be conferred by Greece on the Muslim minority in its territory.

Two features matter for interpretation. First, the beneficiaries are “Turkish nationals”: the text builds minority protection on citizenship, not on a separate legal personality. Second, Article 37 elevates the rules to “fundamental laws”, a standard Ankara has long cited as binding domestic law.

The population exchange context

The minority section cannot be separated from the Convention concerning the Exchange of Greek and Turkish Populations, signed at Lausanne on 30 January 1923. It provided for the compulsory exchange of Greek Orthodox nationals in Türkiye and Muslim nationals in Greece, defined by religion rather than language or self-identification. Commonly cited estimates are about 1.2 million Orthodox Christians moving to Greece and several hundred thousand Muslims moving to Türkiye.

Two groups were excluded: Greek Orthodox “established” in Istanbul before 30 October 1918, and Muslims of Western Thrace. These two communities became the practical beneficiaries of Articles 37–45 and Article 45 respectively. The Permanent Court of International Justice addressed the meaning of “established” in its 1925 advisory opinion on the Exchange of Greek and Turkish Populations.

Timeline

1920: The unratified Treaty of Sèvres contains its own minority clauses; it never entered into force. See the Fact Check on whether Sèvres is still valid.
30 January 1923: Greek–Turkish population exchange convention signed.
24 July 1923: Treaty of Lausanne signed; Articles 37–45 set the minority regime. For how it fits with Alexandropol, Moscow and Kars, see The Treaty Ledger.
1925–1926: Community representatives declare waivers concerning personal-status provisions as Türkiye adopts a new civil code; the scope of these waivers is debated in later scholarship.
1946: The League of Nations is dissolved; the Article 44 guarantee has no direct institutional successor.
2008 and 2011: Türkiye adopts the Foundations Law (No. 5737) and Decree-Law No. 651 on the property of non-Muslim foundations.

Key Players & Positions

Greece

The Greek Ministry of Foreign Affairs presents Lausanne as the legal basis for protecting the Ecumenical Patriarchate in Istanbul and the Greek Orthodox community, and has long urged the reopening of the Halki Theological School, closed since 1971. Greece also stresses Article 14 of Lausanne on Imbros (Gökçeada) and Tenedos (Bozcaada). On its own side, Athens officially describes the Western Thrace community as a “Muslim minority” made up of Turks, Pomaks and Roma, in line with the wording of Lausanne and Article 45, and objects to the collective use of the label “Turkish minority”.

That Greek practice has been tested in Strasbourg. The European Court of Human Rights found violations in associational cases such as Bekir-Ousta and Others v. Greece (2007), and in Molla Sali v. Greece (Grand Chamber, 2018) it criticised the compulsory application of Islamic inheritance law to a member of the Thrace minority. Greece has since made the application of that law optional (Law 4511/2018).

Armenian voices

Armenia was not a party to Lausanne, and Armenian officials and diaspora organisations generally argue that the treaty's silence on Armenian territorial claims left the post-1915 Armenian question unresolved. Within Türkiye, the Armenian Patriarchate of Constantinople and community foundations operate under the Lausanne framework and have raised concerns on property restitution, school administration and the training of clergy. The 2009 Turkey–Armenia protocols, never ratified, nonetheless referred to mutual recognition of the existing border “as defined by relevant treaties of international law”. See also the 2005 Joint Historical Commission offer.

European institutions

The European Commission's annual enlargement reports on Türkiye, and Council of Europe bodies, treat minority and religious freedoms as part of accession-era reform and regularly call for steps such as reopening Halki and improving legal status for religious communities. The Council of Europe's Framework Convention for the Protection of National Minorities has not been signed by Türkiye, and Greece signed it in 1997 without ratifying it. The European Court of Human Rights has ruled against Türkiye in property cases brought by Greek Orthodox foundations, including the Büyükada orphanage litigation (Fener Rum Patrikliği v. Türkiye, 2008).

Other communities

Syriac Orthodox Christians argue that, as non-Muslims, they fall within Articles 37–45, while Turkish practice has traditionally treated only Greek Orthodox, Armenian and Jewish communities as the recognised minorities. Some Muslim groups, such as Alevis, are not covered by the non-Muslim clauses but have brought equality claims under general human-rights law.

🇹🇷 Official Policy · Treaty Texts & Primary Sources

Türkiye's Position

Türkiye's Legal & Historical Position – summarised from the treaty text and Turkish Ministry of Foreign Affairs (MFA) positions:

Lausanne defines the minority regime. According to the Turkish Foreign Ministry, the concept of minority in Türkiye is determined by the Treaty of Lausanne, which covers non-Muslim communities, and the Treaty's Articles 37–45 form the basis of that status. Ankara reads “non-Muslim minorities” in light of the Lausanne negotiating record, which in its practice means the Greek Orthodox, Armenian and Jewish communities.
Equal citizenship is the foundation. Article 39 provides that non-Muslim minority members are Turkish nationals with the same civil and political rights as Muslims. Ankara points to the equality and citizenship provisions of the Turkish Constitution (Articles 10 and 66) as the domestic expression of this principle, and argues that Lausanne protects communities within a single citizenry, not parallel national groups.
Reciprocity is built into the treaty. Article 45 conditions the regime on parallel treatment of the Muslim minority in Greece. The Turkish MFA consistently raises Western Thrace issues, including the appointment of muftis, the use of the word “Turkish” by associations, and minority schooling, as part of the same Lausanne bargain, citing the judgments in Bekir-Ousta and similar cases.
Practice has evolved beyond the text. Ankara cites the 2008 Foundations Law, Decree-Law No. 651 of 2011 on returns of foundation property, and the reopening of a Greek primary school on Gökçeada in 2013 as evidence of implementation and expansion. It treats the Patriarchate as the head of the Turkish Orthodox community and does not accept an international “ecumenical” status for it.
The League guarantee has lapsed, but the obligations remain. Türkiye holds that Article 44's League mechanism ended in 1946, that outside actors have no treaty-based supervisory role, and that the obligations continue as domestic fundamental law (Article 37) and under its ICCPR and ECHR commitments. When Türkiye ratified the ICCPR it entered a reservation to Article 27 referring to the Constitution and Lausanne.

In fairness to critics: the Turkish record includes historical episodes that Greek and Armenian sources emphasise, such as the 1942 Wealth Tax, the 6–7 September 1955 riots in Istanbul and the 1964 expulsion of Greek nationals, and the shrinking of the Istanbul Greek community to a few thousand people. Ankara's reply is that these must be assessed alongside Western Thrace and current legal reforms, not as a continuing state policy.

The Treaty of Guarantee system in Cyprus used a similar logic of treaty-based communal equality; see Cyprus Treaty Architecture and The Political Anatomy's Cyprus Issue Explained.

Source Comparison

Question	Greek and European sources	Turkish primary sources
Who is protected?	Often read broadly: all non-Muslim communities, including Syriac Christians.	Greek Orthodox, Armenian and Jewish communities, as understood at Lausanne.
Is Lausanne a floor or a ceiling?	A floor; European human-rights standards add further rights.	Lausanne defines minority status; wider rights come from domestic reform and general human-rights law.
Role of reciprocity	Rights should not depend on the other state's conduct.	Article 45 expressly pairs both regimes.
Western Thrace identity	“Muslim minority” (Greek MFA); individual identity is private.	“Turkish minority” in addition to Pomaks and Roma, citing association case law.
Article 44 guarantee	Some commentators see a continuing international interest.	The League mechanism ended in 1946.
Key evidence	Commission reports, ECtHR judgments on Türkiye, Halki closure.	Treaty text, Foundations Law 2008, Decree-Law 651, ECtHR judgments on Greece.

For method, see the site's Editorial Principles. On a related misreading of the Lausanne order, see Archive of Nations' Fact Check on Sèvres, Lausanne and Kars.

Non-Muslim minorities: the phrase used in Articles 39–44; its scope is the central interpretive dispute.
Fundamental laws (Article 37): a clause giving the minority provisions precedence over ordinary legislation.
Reciprocity (Article 45): the pairing of the Turkish and Greek minority regimes.
Population exchange: the 1923 compulsory transfer, defined by religion, that shaped the two remaining communities.
Pious foundations (vakıf): community-run religious, educational and charitable institutions, whose property rights are the most litigated area.

Treaty And Precedent presents global and regional affairs with a dedicated perspective from Türkiye. Sections marked 'Türkiye's Legal & Historical Position' reflect official Turkish policy and legal doctrines as stated by Turkish primary sources. — Treaty And Precedent Editorial Team

Frequently asked questions

Which minorities does the Treaty of Lausanne protect?

Articles 37–45 protect Turkish nationals belonging to non-Muslim minorities. In Turkish practice this means the Greek Orthodox, Armenian and Jewish communities, although other non-Muslim groups, such as Syriac Christians, argue that the text covers them too. Article 45 extends equivalent rights to the Muslim minority in Greece.

Does Lausanne give minorities a separate political status?

No. The text grants rights to Turkish nationals and builds on equal civil and political rights under Article 39. It protects religion, language use, education and institutions within a single citizenship, which is how Ankara reads it.

Is the League of Nations guarantee in Article 44 still in force?

The guarantee depended on the League Council and the Permanent Court of International Justice, both of which ceased to exist. Türkiye holds that the mechanism ended with the League in 1946, while the substantive obligations continue as domestic fundamental law and alongside treaties such as the ECHR.

What is the link between Lausanne and Western Thrace?

Article 45 provides that Greece must confer on its Muslim minority the same rights that Türkiye confers on non-Muslims. The Muslims of Western Thrace were exempt from the 1923 population exchange, as were the Greek Orthodox of Istanbul, and the two communities are often discussed together under the principle of reciprocity.

Where can I read the original text of Articles 37–45?

The full treaty is published in the League of Nations Treaty Series and in the Turkish Foreign Ministry's collection of Lausanne documents, and in many university treaty archives. Reading Section III directly takes only a few minutes and is the best way to check how media accounts paraphrase it.

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