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Events on Sunday 29 May 2005 1
2005EU constitution rejected in referendumsFrench and Dutch voters reject the proposed EU constitutionVoters in France rejected the proposed European Union constitutional treaty in a referendum on 29 May 2005, followed by Dutch voters on 1 June 2005. The back-to-back rejections derailed the ratification process and plunged the EU into a period of institutional uncertainty. Elements of the treaty were later revived in the Lisbon Treaty of 2007.