Ideas about European unity in the first half of the 20th century 
(Az európai egységgondolat a huszadik század elején)

• Count Richard Nikolaus von Coudenhove-Kalergi: The Pan-European Manifesto (1923)
• The Briand Memorandum
• Altiero Spinelli, Ernesto Rossi: The Manifesto of Ventotene
• Address given by Winston Churchill (Zurich, 19 September 1946)

The Council of Europe

• Winston Churchill addresses the Congress of Europe in The Hague (7 May 1948)
• Message to Europeans (The Hague, 10 May 1948)
• Statute of the Council of Europe (London, 5 May, 1949)

The European Coal and Steel Community and the European Defence Community

• The Schuman Declaration (9 May 1950)
• The Treaty constituting the European Coal and Steel Community (Paris, 18 April 1951)
• European Defence Community Treaty (Paris, 27 May 1952)
• The Benelux Memorandum (18 May, 1955)
• The Messina Declaration (3 June, 1955)

The Rome Treaties

• The Spaak Report (June 1956)
• Treaty establishing the European Economic Community (25 March 1957)
• Treaty establishing the European Atomic Energy Community (25 March 1957)

The Golden Era of the integration (1958-1973)

• First General Report on the Activities of the Community (1 January 1958 - 17 September 1958)
• Fifth General Report on the Activities of the Community (1 May 1961 - 30 April 1962)
• Association Agreement between the European Economic Community and Turkey (12 September 1963)
• Information memo: Commission proposes independent revenues for EEC, strengthening European Parliament and new rules for financing farming policy (April 1965)
• Press release on the French participation in Council meetings (6 July 1965)
• Final communiqué of the extraordinary session of the Council (January 1966)
• Merger Treaty (Brussels Treaty; 8 April 1965)
• Communiqué of the meeting of Heads of State or Government of the Member States at The Hague (1 and 2 December 1969)
• Report by the Foreign Ministers of the Member States on the problems of political unification /Davignon Report/ (Luxembourg, 27 October 1970)
• Report to the Council and the Commission on the realization by stages of economic and monetary union in the Community /Werner Report/ (8 October 1970)
• The Schuman Plan Declaration (9 May, 1970)
• Treaty concerning the accession of the Kingdom of Denmark, Ireland, the Kingdom of Norway and the United Kingdom of Great Britain and Northern Ireland to the European Economic Community and to the European Atomic Energy Community (1972)

The Nine in the 1970s

• Report on the Regional Problems in the Enlarged Community /Thomson Report/ (May, 1973)
• The Coopenhagen Summit Conference (14 December, 1973)
• Communiqué of the meeting of Heads of State or Government of the Member States in Paris (9 and 10 December 1974)
• Report on European Union /Tindemans Report/ (29 December 1975)
• Press Conference after Dublin European Council /Margaret Thatcher/ (30 November 1979)

Europe of the Ten and Twelve

• Treaty concerning the accession of the Hellenic Republic to the European Economic Community and to the European Atomic Energy Community (1981)
• Draft European Act submitted by the Governments of the FRG and Italy (6 November 1981)
• Solemn Declaration on European Union (Stuttgart, 19 June 1983)
• Draft Treaty Establishing the European Union /Spinelli Plan/ (14 February 1984)
• Fountainebleau European Council (25-26 June 1984)
• Treaty concerning the accession of the Kingdom of Spain and the Republic of Portugal to the to the European Economic Community and to the European Atomic Energy Community (1985)
• Single European Act (17 February 1986)
• Convention implementing the Schengen Agrement (1990)

The EU in the 1990s

• The Community and the German unification. (14 June 1990)
• Association Agreement between the European Economic Community and the Republic of Hungary (16 December 1991)
• Treaty on European Union /Maastricht Treaty/ (7 February 1992)
• Copenhagen European Council (21-22 June 1993)
• Treaty concerning the accession of the Kingdom of Norway, the Republic of Austria, the Republic of Finland and the Kingdom of Sweden to the European Union. (1994)
• European Council at Corfu, Presidency Conclusions (24-25 June 1994)
• European Council at Essen, Presidency Conclusions (9-10 December 1994)
• Reflection Group's Report /Westendorp Report/ (5 December 1995)
• Madrid European Council, Presidency Conclusions (15-16 December 1995)
• Agenda 2000 - For a stronger and wider Union (13 July 1997)
• Commission Opinion on Hungary’s Application for Membership of the European Union (15 July 1997)
• Treaty of Amsterdam (2 October 1997)
• Presidency conclusions of the Luxembourg European Council (12-13 December 1997)
• Presidency conclusions of the Helsinki European Council (10-11 December 1999)

The EU in the 21st century

• Treaty of Nice (26 February 2001)
• Laeken European Council Summit, Presidency Conclusions (14-15 December 2001)
• Parliamentary Debate on European Integration in the Hungarian Parliament (13 November 2002)
• Treaty concerning the accession of the Czech Republic, the Republic of Estonia, the Republic of Cyprus, the Republic of Latvia, the Republic of Lithuania, the Republic of Hungary, the Republic of Malta, the Republic of Poland, the Republic of Slovenia and teh Slovak Republic to the European Union (2003)
• Treaty establishing a Constitution for Europe (2004)
• Treaty concerning the accession of the Republic of Bulgaria and Romania to the European Union (2005)
• Treaty of Lisbon (17 December 2007)
• Treaty concerning the accession of the Republic of Croatia to the European Union (2012)
• A new start for Europe: My Agenda for Jobs, Growth, Fairness and Democratic Change /Jean-Claude Juncker/ (15 July 2014)
• State of the Union 2015: Time for Honesty, Unity and Solidarity /Jean-Claude Juncker/ (9 September 2015)