The Central European Initiative (CEI), composed of 18 Member States, is the largest and oldest forum of regional cooperation in Central, Eastern and South-Eastern Europe. Its origin lies in the creation of a Quadrangolare on 11 November 1989 in Budapest by Italy, Austria, Hungary and the Socialist Federal Republic of Yugoslavia (SFRY). In 1992, the organisation was named Central European Initiative when a number of countries were admitted as Member States.