Iberian summits
The Hispano–Portuguese Summits or simply Iberian Summits are formal meetings conducted by the Government of Portugal and the Government of Spain to discuss issues of mutual concern. The first one was held in November 1983 in Sintra, Portugal. They are chaired by the respective heads of government. In the 2001 summit, both parts agreed to hold additional meetings between the foreign ministers in-between-summits in order to prepare the next Iberian summit in line. Since 2004 presidents of Spanish border regions may also attend to the summits.
Ian Cooper and Federico Fabbrini have mapped this bilateral summit between prime ministers as an instance of "bottom-up regional group within the European Union".