Creation of the Working Community of the Pyrenees which combines: Aquitaine, Languedoc-Roussillon and Midi-Pyrénées, Catalonia, Aragon, Euskadi, Navarra and Andorra.
A common fund is created in 1989, aimed at financing cross-border projects. This is accompanied by an agreement that marks the start of the bilateral cooperation between Aquitaine and Euskadi. In 1992, Navarra joins the partnership, generating a common trilateral fund until 1999.
Creation of a tool with its own legal personality: The PLAE (Aquitaine-Euskadi Logistics Platform) in the form of European Economic Interest Grouping (EEIG) with headquarters in San Sebastian.
Regulation (EC) no. 1082/2006 creating the European Grouping for Territorial Cooperation (EGTC).
Joint declaration of the two presidents to create a Euroregion “Aquitaine-Euskadi” under the form of a European Grouping for Territorial Cooperation (EGTC).
Creation of the Euroregion Aquitaine-Euskadi with headquarters in Hendaye.
Adoption of the 2014-2020 Euroregional Strategy.
Modification of the administrative perimeter of the French regions. Aquitaine, Limousin and Poitou-Charentes legally constitute Nouvelle-Aquitaine, thus forming part of the Euroregion.
Adhesion of Navarra, approved on 18 March 2016 by the Assembly of the Euroregion Aquitaine-Euskadi, which enters into force on 6 March 2017.