Map of Europe indicating the member countries of the Craiova Group
|Establishment||24 April 2015|
|569,594 km2 (219,921 sq mi)|
• 2011 estimate
|78.9/km2 (204.4/sq mi)|
• Per capita
The Craiova Group (Quadrilateral), Craiova Four, or C4 is a cooperation project of four European states – Romania, Bulgaria, Greece and Serbia – for the purposes of furthering their European integration as well as economic, transport and energy cooperation with one another. The Group originated in a summit meeting of the heads of governments of Bulgaria, Romania and Serbia, held on 24 April 2015 in the Romanian city of Craiova. At the group's inaugural meeting, Romania's then-Prime Minister Victor Ponta indicated that he was inspired by the Visegrád Group. Romania and Bulgaria both joined the European Union on 1 January 2007, while Serbia has been in accession negotiations since January 2014. Since October 2017 at the meeting in Varna, Bulgaria, with the inclusion of Greece, meetings have been quadrilateral.
One of the first initiatives, after a meeting in Vidin, Bulgaria, was to strengthen the telecommunication networks in the border areas of the countries. Other goals include helping Serbia join the European Union and the construction of a motorway linking Bucharest, Sofia and Belgrade.
On 2 November 2018, Prime Minister of Bulgaria Boyko Borisov stated that Prime Minister of Greece Alexis Tsipras proposed joint bid for the 2030 FIFA World Cup by Bulgaria, Romania, Serbia and Greece during the meeting in Thessaloniki. Later, this was expanded with proposed bids for UEFA Euro 2028 and UEFA Euro 2032.
|Official name||Romania (România)||Republic of Bulgaria (Република България)||Hellenic Republic (Ελληνική Δημοκρατία)||Republic of Serbia (Република Србија / Republika Srbija)|
|Coat of Arms|
|Area||238,397 km2 (92,046 sq mi)||110,993.6 km2 (42,854.9 sq mi)||131,957 km2 (50,949 sq mi)||88,361 km2(34,116 sq mi)|
|Population Density||84.4/km2 (218.6/sq mi)||64/km2 (165.8/sq mi)||82/km2 (212.4/sq mi)||91.1/km2 (235.9/sq mi)|
|Government||Unitary Semi-presidential constitutional republic||Unitary parliamentary constitutional republic||Unitary parliamentary constitutional republic||Unitary parliamentary constitutional republic|
|Capital||Bucharest – 2,106,144 (2,412,530 Metro)||Sofia – 1,238,438 (1,681,592 Metro)||Athens – 664,046 (3,781,274 Metro)||Belgrade – 1,166,763 (1,687,132 Metro)|
|First Leader||Alexandru Ioan Cuza, Domnitor of the United Principalities (first ruler of the modern unified state)||Khan Asparuh of Bulgaria (founder of the First Bulgarian Empire)||Governor Ioannis Kapodistrias (first head of state of the modern independent state)||Prince Višeslav of Serbia (first ruler known by name)|
|Current Head of Government||Prime Minister Viorica Dăncilă (Social Democratic Party)||Prime Minister Boyko Borisov (GERB)||Prime Minister Alexis Tsipras (Syriza)||Prime Minister Ana Brnabić (Independent)|
|Current Head of State||President Klaus Iohannis (Independent)||President Rumen Radev (Independent)||President Prokopis Pavlopoulos (New Democracy)||President Aleksandar Vučić (SNS)|
|Main religions||81% Eastern Orthodox, 6.2% Protestant, 5.1% Latin and Greek Catholic, 0.2% irreligious, 1.5% Other religious||59.5% Eastern Orthodox, 9.3% irreligious, 7.9% Islam, 0.9% Protestant, 0.7% Roman Catholic||90% Eastern Orthodox, 3% Other Christians (excluding Catholic), 4% irreligious, 2% Islam, 3% Other religious (including Eastern or Western Catholic)||84.59% Eastern Orthodox, 4.97% Roman Catholic, 3.0% Islam, 2.7% Protestant, 2.11% irreligious, 3.54% Other religious|
|Ethnic groups||88.9% Romanians, 6.1% Hungarians, 3.3% Roma, 0.2% Ukrainians, 0.2% Germans||84.8% Bulgarians, 8.8% Turks, 4.9% Roma, 0.7% others||-||83.3% Serbs, 3.5% Hungarians, 2.2% Bosniaks, 1.9% Roma 1.5% Slovaks , 1% Croats , 7.5% others|
|GDP (nominal)||$265 billion, $13,664 per capita||$66.242 billion, $9,504 per capita||$224.033 billion, $20,930 per capita||$50.139 billion, $7,199 per capita|
|GDP (PPP)||$547 billion, $28,189 per capita||$171 billion, 24,577 per capita||$326.700 billion, $30,522 per capita||$118.929 billion, 17,076 per capita|
|External debt||36.8 % of GDP||24 % of GDP||182.2 % of GDP||48.1 % of GDP|
|Currency||Leu (L) – RON||Lev (лв) – BGN||Euro (€) – EUR||Serbian dinar (rsd) – RSD|
|Human Development Index||0.811 (very high)||0.813 (very high)||0.870 (very high)||0.787 (high)|
- Three Seas Initiative
- Inner Six
- Central European Initiative
- Visegrád Group
- Central European Defence Cooperation
- New Hanseatic League
- "Bulgaria, Romania, Serbia Establish Craiova Group for Cooperation". Novinite. 24 April 2015.
- "Vucic meets with Romanian and Bulgarian counterparts". B92. 24 April 2015.
- "Prime Minister Mihai Tudose participated in the Romania - Bulgaria - Serbia - Greece quadrilateral meeting". gov.ro. 9 December 2017.
- "България, Румъния и Сърбия свързват телекомуникационните си мрежи" (in Bulgarian). Investor. 17 June 2015.
- "Bulgaria, Romania, Serbia, Greece eye joint bid for hosting 2030 FIFA World Cup". seenews.com. Retrieved 2 November 2018.