 Both countries are full members of many international organizations, including NATO, the European Union, the Council of Europe, the OECD and the WTO.Greece and Italy were also part of the European Territorial Cooperation Programme (2007–2013), for the boost of cross-border cooperation in the Mediterranean Sea.The Hellenic Institute for Byzantine and Post-Byzantine Studies opened in Venice in 1951, providing for the study of Byzantine and Post-Byzantine history in Italy.