Bulgaria–Greece relations are the
bilateral relations
Bilateralism is the conduct of political, economic, or cultural relations between two sovereign states. It is in contrast to unilateralism or multilateralism, which is activity by a single state or jointly by multiple states, respectively. When ...
between the
Republic of Bulgaria
Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
and the
Hellenic Republic
Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
.
Due to the strong political, cultural and religious ties between the two nations, Bulgaria and Greece today enjoy healthy diplomatic relations
and consider each other a friendly nation and an ally.
Greece is a strong supporter of Bulgaria's
Euro-Atlantic integration and entry into the
Schengen Area
The Schengen Area ( , ) encompasses European countries that have officially abolished border controls at their common borders. As an element within the wider area of freedom, security and justice (AFSJ) policy of the European Union (EU), it ...
. Bulgaria and Greece share common political views about the Balkans, the enlargement plans of the
European Union
The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
and the rest of the world, with Bulgaria having been a supporter of Greece's stance on the
Macedonia naming dispute
The use of the country name "Macedonia (terminology), Macedonia" was disputed between Greece and the North Macedonia, Republic of Macedonia (now North Macedonia) between 1991 and 2019. The dispute was a source of instability in the Balkans#W ...
. Modern relations between the two countries were established in 1908 and are regarded as excellent despite the
Axis occupation of Greece
The occupation of Greece by the Axis Powers () began in April 1941 after Nazi Germany Battle of Greece, invaded the Kingdom of Greece in order to assist its ally, Fascist Italy (1922–1943), Italy, in their Greco-Italian War, ongoing war that w ...
by Bulgaria, Italy and Germany during World War II.
Both countries are full members of the
Council of Europe
The Council of Europe (CoE; , CdE) is an international organisation with the goal of upholding human rights, democracy and the Law in Europe, rule of law in Europe. Founded in 1949, it is Europe's oldest intergovernmental organisation, represe ...
, the European Union and
NATO
The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...
.
History

The common heritage of both nations played a significant role in the close relations between the two countries, ever since the
Medieval Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, between
Southern Slavs
South Slavs are Slavic people who speak South Slavic languages and inhabit a contiguous region of Southeast Europe comprising the eastern Alps and the Balkan Peninsula. Geographically separated from the West Slavs and East Slavs by Austria, Hun ...
and
Byzantine Greeks
The Byzantine Greeks were the Medieval Greek, Greek-speaking Eastern Romans throughout Late Antiquity and the Middle Ages. They were the main inhabitants of the lands of the Byzantine Empire (Eastern Roman Empire), of Constantinople and Asia ...
(the
Byzantine Empire
The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...
played a prominent role in spreading of the
Orthodox Christianity
Orthodox, Orthodoxy, or Orthodoxism may refer to:
Religion
* Orthodoxy, adherence to accepted norms, more specifically adherence to creeds, especially within Christianity and Judaism, but also less commonly in non-Abrahamic religions like Neo-pag ...
to Bulgaria and the rest of the
Balkans
The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...
). The missionaries
Cyril and Methodius
Cyril (; born Constantine, 826–869) and Methodius (; born Michael, 815–885) were brothers, Population of the Byzantine Empire, Byzantine Christian theologians and Christian missionaries, missionaries. For their work evangelizing the Slavs ...
from the city of
Thessalonica
Thessaloniki (; ), also known as Thessalonica (), Saloniki, Salonika, or Salonica (), is the second-largest city in Greece (with slightly over one million inhabitants in its metropolitan area) and the capital city, capital of the geographic reg ...
were the founders of the
Glagolitic script
The Glagolitic script ( , , ''glagolitsa'') is the oldest known Slavic alphabet. It is generally agreed that it was created in the 9th century for the purpose of translating liturgical texts into Old Church Slavonic by Saint Cyril, a monk fro ...
and the first
literary language
Literary language is the Register (sociolinguistics), register of a language used when writing in a formal, academic writing, academic, or particularly polite tone; when speaking or writing in such a tone, it can also be known as formal language. ...
of the Slavs, from which the modern
Bulgarian Language
Bulgarian (; , ) is an Eastern South Slavic, Eastern South Slavic language spoken in Southeast Europe, primarily in Bulgaria. It is the language of the Bulgarians.
Along with the closely related Macedonian language (collectively forming the ...
evolved.
Between the late 14th century and the early 15th century, both Bulgaria and Greece came under
Ottoman rule for nearly five centuries. During this period the
Bulgarian Patriarchate was abolished and the
Patriarch of Constantinople
The ecumenical patriarch of Constantinople () is the archbishop of Constantinople and (first among equals) among the heads of the several autocephalous churches that comprise the Eastern Orthodox Church. The ecumenical patriarch is regarded as ...
was declared by the
Ottoman Sultan
The sultans of the Ottoman Empire (), who were all members of the Ottoman dynasty (House of Osman), ruled over the Boundaries between the continents, transcontinental empire from its perceived inception in 1299 to Dissolution of the Ottoman Em ...
as the spiritual leader of all the Orthodox Christians in the
Ottoman Empire
The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
, regardless of their ethnicity. In the 19th century the Bulgarians began a struggle for the restoration of an independent Bulgarian church, which was met with stiff opposition by the Constantinople Patriarchy. While the Bulgarian Orthodox Church was restored in 1872, the Ecumenical Patriarchate, refused to recognize it until much later, in 1945, and especially after the collapse of the Ottoman Empire and the end of the
Balkan
The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...
and
World Wars
A world war is an international conflict that involves most or all of the world's major powers. Conventionally, the term is reserved for two major international conflicts that occurred during the first half of the 20th century, World War I (19 ...
.
In the earlier 20th century the relations were affected by periods of intense mutual hostility. Since Bulgaria's independence in 1908, Greece and Bulgaria took part in three major wars in opposite coalitions, the
Second Balkan War
The Second Balkan War was a conflict that broke out when Kingdom of Bulgaria, Bulgaria, dissatisfied with its share of the spoils of the First Balkan War, attacked its former allies, Kingdom of Serbia, Serbia and Kingdom of Greece, Greece, on 1 ...
(although they were allies at the
First Balkan War
The First Balkan War lasted from October 1912 to May 1913 and involved actions of the Balkan League (the Kingdoms of Kingdom of Bulgaria, Bulgaria, Kingdom of Serbia, Serbia, Kingdom of Greece, Greece and Kingdom of Montenegro, Montenegro) agai ...
), the
First World War
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
and the
Second World War
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, plus the
Cold War
The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
, and they even fought a "
Stray dog war" in 1925.
After the
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, the relations between Greece and Bulgaria have been flourishing, and as the Greek President
Konstantinos Tsatsos
Konstantinos D. Tsatsos (; July 1, 1899 – October 8, 1987) was a Greek diplomat, professor of law, scholar and politician. He served as the List of heads of state of Greece#Third Hellenic Republic (since 1974), second President of Greece, Pr ...
said during the Bulgarian leader
Todor Zhivkov
Todor Hristov Zhivkov ( ; 7 September 1911 – 5 August 1998) was a Bulgarians, Bulgarian communist statesman who served as the ''de facto'' leader of the People's Republic of Bulgaria (PRB) from 1954 until 1989 as General Secretary of the Cen ...
's visit to Athens in April 1976, "the old controversies have been forgotten and the hatchet buried forever". Greece became a firm supporter of Bulgaria's
EU membership and was the fifth EU member state and the first old member state to ratify the Accession Treaty.
[Greek Ministry of Foreign Affairs]
Bilateral relations between Greece and Bulgaria
Since Bulgaria joined
NATO
The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...
in May 2004, Greek-Bulgarian relations have been developing on all fronts, and the Greek Ministry of Foreign Affairs describes relations between Greece and Bulgaria as "excellent".
In 2018, declassified documents of the
Communist Bulgaria
The People's Republic of Bulgaria (PRB; , NRB; ) was the official name of Bulgaria when it was a socialist state, socialist republic from 1946 to 1990, ruled by the Bulgarian Communist Party (BCP; ) together with its coalition partner, the Bul ...
revealed a plan to foment crisis between
Turkey
Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...
and Greece in 1971. The operation codenamed "Cross" and the plan was that Bulgarian secret agents would set fire on the
Ecumenical Patriarchate of Constantinople
The Ecumenical Patriarchate of Constantinople (, ; ; , "Roman Orthodox Patriarchate, Ecumenical Patriarchate of Istanbul") is one of the fifteen to seventeen autocephalous churches that together compose the Eastern Orthodox Church. It is heade ...
and make it look like the work of Turks. The declassified documents state that "
intervention" in the religious entity would have "significantly damage
Turkish-Greek relations and force
the United States to choose one side in the ensuing crisis". In addition, the Bulgarians also planned to boost the effect of its operation against Greece and Turkey by conducting "active measures
��for putting the enemy in a position of delusion." The plan was developed by the 7th Department of the First Main Directorate of the
DS (intelligence and secret police services of communist Bulgaria), and was affirmed by Deputy Head of the Directorate on 16 November 1970, and approved by its Head. The operation was supposed to be prepared by the middle of 1971 and then executed, but it was abandoned.
Bilateral relations and cooperation
Diplomatic relations were established in 1908. Bulgaria has an embassy in
Athens
Athens ( ) is the Capital city, capital and List of cities and towns in Greece, largest city of Greece. A significant coastal urban area in the Mediterranean, Athens is also the capital of the Attica (region), Attica region and is the southe ...
and Greece has an embassy in
Sofia
Sofia is the Capital city, capital and List of cities and towns in Bulgaria, largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Is ...
. Greece is the top investor and one of Bulgaria's main trade partners. Both states are co-operating in many fields, such as political, judicial, energy and tourism. There are regular high-level visits between the two countries, and frequent contacts between the two countries' governments and the local authorities on various matters concerning individual sectors, such as the control of flow of the
Maritsa River
Maritsa or Maritza ( ), also known as Evros ( ) and Meriç ( ), is a river that runs through the Balkans in Southeast Europe. With a length of , (also known as Evros) of which the overflow during times of strong rainfall, threatens the towns and villages in the regions it flows through. Big projects currently in running between the two countries include the touristic development and the gas pipelines. Official meetings between the two governments and the Presidents of the State are frequent and the armies of both states cooperate and are co-training in a regular basis as part of the NATO training programme.
Educational cooperation
Greek and Bulgarian university professors created the "Hellenic Educational Association of Sofia" after the collapse of communism in Bulgaria, which assists the Bulgarian students who learn Greek. Also the "Federation of Cultural and Educational Associations of Karakatsani of Bulgaria" helps the 15,000
Sarakatsani
The Sarakatsani (), also called Karakachani (), are an ethnic Greeks, Greek population subgroup who were traditionally Transhumance, transhumant shepherds, native to Greece, with a smaller presence in neighbouring Bulgaria, southern Albania, an ...
in receiving education on Greek language and culture. There are more than 2,000 Greek university students in Bulgaria, which constitutes one of the largest groups of foreign university students in Bulgaria.
Diasporas

Historically, there have been sizable Greek and Bulgarian communities in the territories which form present day Bulgaria and Greece respectively. These communities today are significantly decreased due to the
population exchanges between Greece and Bulgaria which were directed under the
Treaty of Neuilly
The Treaty of Neuilly-sur-Seine (; ) was a treaty between the victorious Allies of World War I on the one hand, and Bulgaria, one of the defeated Central Powers in World War I, on the other. The treaty required Bulgaria to cede various territor ...
in 1919.
In 1900, Greeks were about 80,000 (2% of the Bulgarian population) and despite its small size the minority was prominent in the commercial activities and visible in the cultural life.
According to the 2001 census, there were 35,104 Bulgarian citizens in Greece, constituting 4,7% of all foreigners in Greece. However, that number has risen since then, as in 2003–2004, Bulgarians accounted for 9,8% of residence permit holders in Greece, out of which 473 were students and 2,059 were married to EU nationals.
[Hellenic Migration Policy Institute (ΙΜΕΠΟ)]
statistical data on immigrants in Greece
In the academic year 2002–2003, there were 2,873 non-ethnic Greek citizens of Bulgaria in Greek state schools.
[ There are numerous publications in Greece for the Bulgarian community, including the bilingual newspaper ''България днес/Βουλγαρία σήμερα'' (Bulgaria today).
According to the 2001 census, there were 3,408 Greeks in Bulgaria. This figure most likely includes, former political refugees, remnants of the population exchanges, students, and businessmen and their families. In addition, there were 4,108 ]Sarakatsani
The Sarakatsani (), also called Karakachani (), are an ethnic Greeks, Greek population subgroup who were traditionally Transhumance, transhumant shepherds, native to Greece, with a smaller presence in neighbouring Bulgaria, southern Albania, an ...
.
Agreements
The main Inter-State Agreements signed over the past 15 years are as follows:
* Avoidance of Double Taxation on Income and Capital (Athens, 15/2/1991)
* Police Cooperation (covering clandestine immigration, terrorism, organised crime, and police training) (Athens, 8/7/1991)
* Cooperation between Ministries of Defence and Armed Forces (Athens, 28/11/1991)
* Agreement on Seasonal Workers (Athens, 15/12/1995)
* Agreement on the Waters of the River Nestos (Sofia 22/12/1995)
* Agreement on the Opening of Three New Border Posts and Arterial Road Links between the two countries (Sofia 22/12/1995)
* Military and Technical Cooperation (March 1998)
* Scientific, Educational and Cultural Agreement (Sofia 12/6/2002) (in application of Article 13 of the Bilateral Cultural Agreement (Athens, 31/05/1973)
* Five-Year Development Cooperation Agreement within the framework of the HIBERB (development Aid to Bulgaria of 54,29 million euros) (28/08/2002)
* Bilateral Environmental Protection Agreement (Athens, 01/11/2002)
* Aviation Agreement (Athens, 01/11/2002)
* Scientific and Technological Cooperation Protocol (Athens, December 2002)
Diplomacy
;Republic of Bulgaria
*Athens
Athens ( ) is the Capital city, capital and List of cities and towns in Greece, largest city of Greece. A significant coastal urban area in the Mediterranean, Athens is also the capital of the Attica (region), Attica region and is the southe ...
(Embassy)
*Thessaloniki
Thessaloniki (; ), also known as Thessalonica (), Saloniki, Salonika, or Salonica (), is the second-largest city in Greece (with slightly over one million inhabitants in its Thessaloniki metropolitan area, metropolitan area) and the capital cit ...
(Consulate-General)
;Republic of Greece
*Sofia
Sofia is the Capital city, capital and List of cities and towns in Bulgaria, largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Is ...
(Embassy)
File:Greek embassy in Sofia 2012 PD IMG 2746.jpg, Embassy of Greece in Sofia
Border
The Bulgaria–Greece border, which is Greece's longest border and Bulgaria's second-longest border, was established in 1919. A 15 to 45 km deep surveillance zone was established.
See also
* Balkan Battlegroup
* Bulgarians in Greece
* Greeks in Bulgaria
* Foreign relations of Bulgaria
The foreign relations of Bulgaria are overseen by the Ministry of Foreign Relations headed by the Minister of Foreign Affairs. Situated in Southeast Europe, Bulgaria is a member of both NATO (since 2004) and the European Union (since 2007). It m ...
* Foreign relations of Greece
As one of the oldest Euro-Atlantic member states in the region of Southeast Europe, Greece enjoys a prominent geopolitical role as a middle power, due to its political and geographical proximity to Europe. Greece maintains strong relations with ...
* Sarakatsani
The Sarakatsani (), also called Karakachani (), are an ethnic Greeks, Greek population subgroup who were traditionally Transhumance, transhumant shepherds, native to Greece, with a smaller presence in neighbouring Bulgaria, southern Albania, an ...
References
External links
Greek Ministry of Foreign Affairs about the relation with Bulgaria
Greek embassy in Sofia (in Greek and Bulgarian only)
{{DEFAULTSORT:Bulgaria-Greece Relations
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
Bulgaria
Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...