The Three Seas Initiative. A Historical Overview



The Three Seas Initiative brings together twelve countries situated between the Black, the Baltic and the Adriatic Sea, i.e. Austria, Bulgaria, Croatia, the Czech Republic, Estonia, Lithuania, Latvia, Poland, Romania, Slovakia, Slovenia and Hungary. The idea behind the initiative is to develop a joint forum for closer co-operation between EU countries in Central Europe.

The history of the Three Seas countries is rich and the cultural and religious heritage of their nations diverse. However, the stories of those twelve countries have one common chapter that largely halted the economic growth of the region for almost fifty years. The Iron Curtain stretched from the Baltic to the Adriatic, dividing Europe into two parts and preventing international unity. While the nations of Western Europe were developing their infrastructure and became interconnected by roads, railways, power lines and oil and gas pipes, their Central and East European counterparts remained separated from one another, with outdated infrastructure and economic disparities. The deficit was particularly onerous in the north-south axis of the region. With the aid of the European Union, the situation has improved. Joint economic policy of the EU enabled stable growth of the whole of Europe; yet, economic inequalities that originated in the second half of the 20th century still persist. Eliminating that deficit would offer the region a fantastic development opportunity and make entire Europe stronger and more united.

In 2014, those inequalities were noticed by the Atlantic Council, the U.S. consultative organization. The issues described in their report inspired the President of Croatia Kolinda Grabar-Kitarović and the President of Poland Andrzej Duda to undertake in 2015 the economic and political initiative of the Three Seas aimed to boost cohesion initiatives undertaken by the European Union and complement them – without being a competitive project, as it is sometimes perceived.

Other major events in the history of the Three Seas Initiative were its Summits. So far, five such Summits have taken place:

  • the first Summit of the Three Seas Initiative held on 25 August 2016 in Dubrovnik (Croatia). The participants adopted the declaration and expressed their approval for the Three Seas Initiative as the space for mutual support in economic projects.
  • the second 3SI Summit held between 6 and 7 July 2017 in Warsaw, with Donald Trump as a special guest.
  • the third 3SI Summit held between 17 and 18 September 2018 in Bucharest, Romania, during which the Three Seas Initiative Fund was established.
  • the fourth 3SI Summit in Ljubljana, capital of Slovenia, held between 5 and 6 June 2019, during which formal registration of the Three Seas Initiative Investment Fund was officially confirmed.

Representatives of Czech, Romanian and Polish institutions joined the Fund authorities.

  • the fifth 3SI Summit in Tallinn, Estonia held between 19 and 20 October 2020, at which the member states adopted the declaration of increased contribution to the Three Seas Fund. Due to the pandemic situation, the Tallinn Summit was held in the mixed formula, with in-person and remote participation.

Thus, the Three Seas initiative continues and its history is being written with each passing year. The next chapter will be the Local Government Economic Congress II Three Seas Initiative Forum of Regions coming up on 29th June 2021 in Lublin!

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Registration for the 6th Three Seas Local Government Congress is now open



The 6th edition of the Three Seas Local Government Congress will take place May 27-28, 2026, in Lublin. It is a forum that brings together the visions, experience, and potential of the Central and Eastern European countries.



The Three Seas Local Government Congress is a prestigious international event organised by the Lubelskie Voivodeship. The Congress serves as a platform for cooperation among 13 countries of the Three Seas Initiative and associated members (Ukraine, Moldova, Albania, and Montenegro), focusing on infrastructure development, security, innovation, and cross-border cooperation. Over the past five editions, the Congress has gathered more than 5000 participants from over 25 countries, including representatives of governments, local and regional authorities, business, and academia. The event is held under the Honorary Patronage of the President of the Republic of Poland. Representatives of more than 350 regions from the Three Seas Initiative are invited to attend the Congress. It is a multidimensional event. Its accompanying activities include the Economic Forum, a scientific session of the Three Seas Universities Network, and the 3Seas Youth Forum. The upcoming edition of the Congress will be expanded to include a Security Forum addressed to local governments from the Three Seas region.



The Economic Forum comprehensively supports the offer of SMEs from the Lubelskie Voivodeship. Its aim is to create conditions for the development of entrepreneurship and investor services, as well as to build lasting economic relationships and facilitate the exchange of experience and inspiration in the field of the economy. Topics addressed during the Forum will include, among others: Feminine Lubelskie, Innovation, entrepreneurship (B2B Zone / Exhibition Zone), the 20th anniversary of Marka Lubelskie, and international cooperation. The Economic Forum is a unique platform for networking, signing agreements, and presenting technologies and solutions that create real opportunities for regional economic cooperation in times of global tension.



The Security Forum is a key accompanying event of the Three Seas Local Government Congress, dedicated to challenges and opportunities in the broadly understood field of security for regions involved in the Network of the Three Seas Regions project. At its core is the exchange of experience and the building of cooperation among local governments, organizations, experts, and business representatives from the 13 countries of the Three Seas Initiative. Topics discussed during the Forum will include, among others: local resilience, health and social security, protection of critical infrastructure, cybersecurity, and the role of local governments in crisis response. The co-organiser of the Security Forum is Defence24.



We cordially invite you to take part in the Congress!

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