 In this sense, bilateral cooperation between the two has been reinforced by the observer status of Spain in the Baltic Sea Coast States Council (CBSS), since 2009.Spain and Lithuania share many interests within the European Union, such as the defense of the Principles of Cohesion and Solidarity, the construction of energy infrastructures that prevent the isolation of certain countries, the need for an adequate budget allocation for the Union or the importance it attaches to the control of the external borders of the Union.Lithuania was the only Baltic country that participated in the Expo Zaragoza in 2008 where this country was represented the pavilion "the House of Rain" visited by the Lithuanian Prime Minister on the day Lithuanian national at the Expo.