One of the most important treaties in the story of the European Union is, out of any doubt, the Treaty of Lisbon, signed by EU state member on 13th December 2007 and entered into force since 1st January 2009. This treaty gave to the EU more modern institutions and new working methods, in order to be ready to challenge new challenges in the future.
Among the other, the Treaty of Lisbon took some important decisions regarding the European Council. First of all we’ve seen the separation betweek the two, so then between the European Council itself and the Council of Ministers. That means the European Council officially became a real institution of the EU.
This institution irself is formed by the head of State or the head of Government of the EU members states, by the President of the European Council (which currently is the belgian Herman Van Rompuy) and by the President of the European Commission (which currently is the portuguese José Manuel Barroso). Unlike the European Commission, the appointment of the President of European Council must not have to reflect the Composition of European Parliament, that means he/she can be a person from a different political party.
The Treaty of Lisbon determined some tasks to be taken by the European Council and regarding the definition of strategic priorities for the EU itself. The Treaty of Lisbon also gave to this institution an important role in the appointment of the Commission, of the Foreign Affairs Representative for the EU and of the European Central Bank board members.