The Visegrád Group, or Visegrád Four, V4, is a political alliance of four countries of central Europe: the Czech Republic, Hungary, Poland and Slovakia, all of which are members of the European Union and of NATO, to advance co-operation in military, cultural, economic and energy matters with one-another and to further their integration to the EU.
The Group traces its origins to the summit meetings of leaders from Czechoslovakia, Hungary and Poland held in the Hungarian castle town of Visegrád on 15 February 1991. Visegrád was chosen as the location for the 1991 meeting as an intentional allusion to the medieval Congress of Visegrád in 1335 between Kings John I of Bohemia, Charles I of Hungary and Casimir III of Poland.
After the dissolution of Czechoslovakia in 1993, the Czech Republic and Slovakia became independent members of the group, thus increasing the number of members from three to four. All four members of the Visegrád Group joined the European Union on 1 May 2004.
In the second decade of the 21st century, there has arisen substantial differences between the Visegrád nations and the European Union over the latter's policies, which they sought to impose on all EU member-states, on social matters such as homosexuality, gender, and associated issues, and, particularly, on non-European immigration. Essentially, the Visegrád 4 oppose them all. For this opposition the EU is preparing a range of sanctions against all of these countries.
- The Bratislava Declaration of the Prime Ministers of the Czech Republic, the Republic of Hungary, the Republic of Poland and the Slovak Republic on the occasion of the 20th anniversary of the Visegrád Group (17 February 2011).
- Engelberg, Stephen (17 February 1991). "Three Eastern European Leaders Confer, Gingerly". The New York Times. https://www.nytimes.com/1991/02/17/world/three-eastern-european-leaders-confer-gingerly.html.