Key figures: José Manuel Barroso (Commission President), Angela Merkel (German Chancellor, EU Council President during first-half 2007), Nicolas Sarkozy (French President), Gordon Brown (UK Prime Minister), representatives of all 27 EU member states
Summary
On December 13, 2007, the heads of state and government of all 27 European Union member states gathered at the Jerónimos Monastery in Lisbon, Portugal, to sign the Treaty of Lisbon (officially the Treaty of Lisbon amending the Treaty on European Union and the Treaty establishing the European Community). The treaty represented a landmark constitutional reform aimed at streamlining EU governance, enhancing democratic legitimacy, and strengthening the Union’s capacity to act on the global stage. Unlike the failed Constitutional Treaty of 2005—rejected by French and Dutch voters in referenda held in May–June 2005—the Lisbon Treaty adopted a lower-profile reform approach, amending existing EU treaties (the Treaty on European Union and the Treaty of Rome) rather than replacing them wholesale with a single constitutional document.
The treaty introduced sweeping institutional changes: a permanent President of the European Council (elected by qualified majority for a renewable 2.5-year term, replacing the 6-month rotating presidency for summits); a new High Representative of the Union for Foreign Affairs and Security Policy (combining the former Council Secretary-General’s foreign policy role with a Commission Vice Presidency); the extension of qualified majority voting—which requires 55% of member states representing 65% of the EU population—to approximately 40 new policy areas, reducing vetoes; and substantial expansion of the co-decision legislative power of the European Parliament, which gained equal standing with the Council in most policy areas. The Charter of Fundamental Rights of the European Union, proclaimed in 2000, received legally binding status equivalent to the treaties themselves, though with opt-outs for the UK and Poland.
UK Prime Minister Gordon Brown, who faced domestic Labour Party pressure over the absence of a referendum (Blair had promised one for the Constitutional Treaty), arrived late to the formal signing ceremony on December 13, signing the documents separately in a side room approximately three hours after other leaders. Gordon Brown had become Prime Minister only six months earlier, inheriting the treaty negotiation and the politically charged question of whether a public vote was required.
Background: From Constitutional Treaty to Lisbon
The Lisbon Treaty was the product of a two-year diplomatic recovery effort following the collapse of the European Constitutional Treaty project. The Constitutional Treaty—negotiated in 2004 under the Convention on the Future of Europe chaired by former French President Valéry Giscard d’Estaing—was rejected in a French referendum on May 29, 2005 (54.7% against), and again in a Dutch referendum on June 1, 2005 (61.6% against). Both rejections reflected public anxieties about EU enlargement, immigration, economic liberalization, and democratic accountability rather than the treaty’s specific provisions. The French “No” was particularly significant, as France was one of the EU’s founding members and a traditional engine of European integration.
Following a period of reflection in 2005–2006, Germany’s Angela Merkel—whose country held the EU Council Presidency in the first half of 2007—brokered the Berlin Declaration of March 25, 2007, renewing commitment to EU reform by the 50th anniversary of the Treaty of Rome. Germany’s presidency produced the “mandate” for a new reform treaty in June 2007, specifying that the constitutional framework would be disaggregated into treaty amendments rather than a single constitutional text, that all references to EU symbols (flag, anthem, motto) would be removed, and that the word “Constitution” would not appear. The Portuguese presidency (July–December 2007) under José Sócrates then finalized the text through an Intergovernmental Conference, completing negotiations by October 2007 and readying the signing in Lisbon in December.
Key Provisions
| Reform | Detail |
|---|---|
| Permanent European Council President | Elected by qualified majority for 2.5 years (renewable once); replaces rotating 6-month summit presidency |
| High Representative for Foreign Affairs | Dual-hatted: Vice President of the Commission + Council foreign policy chief; heads European External Action Service |
| Qualified Majority Voting | Extended to ~40 new areas; redefined as 55% of states + 65% of EU population (effective 2014 with transition period) |
| European Parliament | Co-decision (ordinary legislative procedure) extended to agriculture, fisheries, immigration, justice and home affairs |
| Charter of Fundamental Rights | Legally binding, but UK and Poland opt-out from direct judicial application |
| National Parliaments | 8-week review period and “yellow card” mechanism to challenge subsidiarity (enough to force Commission re-examination) |
| Citizens’ Initiative | 1 million EU citizens across several states can petition the Commission to propose legislation |
| Withdrawal Clause | Article 50 — first formal mechanism for a member state to leave the EU |
Ratification Timeline
Ratification required approval by all 27 member states, a process that proved significantly more fraught than negotiators had anticipated.
- Hungary, January 17, 2008: First member state to ratify, by parliamentary vote.
- Ireland, June 12, 2008: Irish voters rejected the treaty in the first referendum, 53.4% to 46.6%, on a 53% turnout. Ireland was the only member state constitutionally required to hold a referendum. The “No” campaign emphasized concerns about Irish neutrality, abortion law, corporate tax, and commissioner representation.
- Germany: President Horst Köhler declined to sign ratification documents in March 2008, pending a Constitutional Court review. The German Federal Constitutional Court approved the treaty on June 30, 2009, but required accompanying domestic legislation to strengthen Bundestag and Bundesrat oversight.
- Czech Republic: President Václav Klaus refused to sign ratification until the Czech Constitutional Court completed its review and until he received a personal opt-out from the Charter of Fundamental Rights (later granted). The Czech Republic was the last member state to ratify, on November 3, 2009.
- Ireland, October 2, 2009: Irish voters approved the treaty in a second referendum, 67.1% to 32.9%, on a 59% turnout, following the negotiation of guarantees on Irish neutrality, taxation, and commissioner representation.
- Entry into force, December 1, 2009: The treaty took effect after the Czech signature on November 3, completing 27 ratifications.
The EU’s first permanent European Council President was Belgian Prime Minister Herman Van Rompuy, elected on November 19, 2009. British politician and EU Trade Commissioner Catherine Ashton became the first High Representative for Foreign Affairs.
Significance
The Treaty of Lisbon resolved a constitutional crisis that had paralyzed EU institutional development since 2005 and established the governance framework for an enlarged Union of 27 members—expanded from the original six founding states of 1957. The qualified majority voting reforms and expanded parliamentary powers addressed the “democratic deficit” critique that had fueled the 2005 “No” votes, while the institutional streamlining (permanent Council president, unified foreign affairs voice) equipped the EU to respond more coherently to external challenges.
Article 50, the withdrawal clause introduced by Lisbon, became one of the treaty’s most consequential provisions despite receiving little attention at signing: it was invoked on March 29, 2017, by the United Kingdom following the Brexit referendum of June 23, 2016—the first use of the withdrawal mechanism in EU history. The Australian Federal Election of November 2007, held just weeks before the Lisbon signing, similarly represented a generational leadership change reshaping a Western democracy’s institutional posture, illustrating the breadth of democratic transitions occurring across allied nations in late 2007.
The Lisbon framework endured as the EU’s constitutional basis through the subsequent euro-area debt crisis (2010–2015), migration crisis (2015–2016), and Brexit negotiations (2017–2020), demonstrating the treaty’s durability even as it was tested by pressures its drafters had not fully anticipated.