On the 5th and 6th of June 2019, the biggest political and business event in the history of independent Slovenia (1991 –) took place at the GR - Ljubljana Exhibition and Convention Centre - the 4th conference of the Three Sea Initiative in the region between the Adriatic, the Baltic and the Black Sea. The event was attended by nine state presidents, the President of the European Commission Mr. Jean-Claude Juncker and the US Secretary of Energy Mr. Rick Perry at the invitation of the Slovenian President Mr. Borut Pahor. The meeting was attended by 12 Member States of the European Union: Austria, Bulgaria, Croatia, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia and Slovenia.
As a part of the Summit, Prime Minister Mr. Marjan Šarec hosted a business forum of the Initiative, that took place at the GR and was attended by more than 550 guests. In a two-day event, they tried to convince institutional and private investors to finance cross-border co-operation projects in the energy, transport and digital fields. Among the Slovenian projects, the current largest infrastructure project - the second track Koper-Divača was discussed as well. The event took place in the complex of marble halls (Marmorna dvorana) and numerous smaller halls, such as the Urška Hall and the Podvodni Mož Hall, under the strictest security measures. The organizer, the Slovenian Ministry of Foreign Affairs assessed the cooperation with the GR Team very positively. They expressed their enthusiasm regarding the attitude of the staff, the professionalism of the technical team and hostesses as well as the layout i.e. appearance of the Marmorna Hall, where the main part of the forum was taking place.