Copenhagen European Council sets accession criteriaJun 21, 1993Labels: Copenhagen Criteria, European CouncilEP Summits
Commission publishes Agenda 2000 enlargement strategyJul 15, 1997Labels: Agenda 2000, European CommissionUK Parliament
Luxembourg European Council launches enlargement processDec 12, 1997Labels: Luxembourg EuropeanEP Overview
Accession negotiations open with first-wave candidatesMar 31, 1998Labels: First-wave candidatesEP OverviewRFE RL
Helsinki European Council expands negotiations to more statesDec 10, 1999Labels: Helsinki EuropeanEP OverviewCVCE
Copenhagen European Council concludes talks with ten statesDec 12, 2002Labels: Copenhagen EuropeanEurofoundUK Hansard
Accession Treaty for ten countries is signed in AthensApr 16, 2003Labels: Treaty of, Athens signingCommissionRFE RL
Ten states join the European Union (2004 enlargement)May 1, 2004Labels: 2004 EnlargementCommissionEU History
Brussels European Council welcomes Bulgaria and Romania’s 2007 accessionDec 17, 2004Labels: Brussels EuropeanCVCE
Bulgaria and Romania sign the Treaty of Accession 2005Apr 25, 2005Labels: Treaty of, Luxembourg signingAccession 2005
Bulgaria and Romania accede to the European UnionJan 1, 2007Labels: Bulgaria, RomaniaEU 2007Accession 2005