Council of Europe conventions/treaties are also open for signature to non-member states, thus facilitating equal co-operation with countries outside Europe. The Council of Europe's most famous achievement is the European Convention on Human Rights, which was adopted in 1950 following a report by the Council of Europe's Parliamentary Assembly, and followed on from the United Nations 'Universal Declaration of Human Rights' (UDHR). The Convention created the European Court of Human Rights in Strasbourg. The Court supervises compliance with the European Convention on Human Rights and thus functions as the highest European court. It is to this court that Europeans can bring cases if
President of the European Council facing Europe, but was overtaken by the Greek economic crisis. The role of "President-in-Office" of the assembled European Council was performed by the head of state or government of the member state currently holding the Presidency of the Council of the European Union. This presidency rotated every six months, meaning there was a new President of the European Council twice a year. The role as President-in-Office was merely a "primus inter pares" role among other European heads of state or government. Being primarily responsible for preparing and chairing the meetings of the European Council, the role had no executive powers