2005 年 5 月和 6 月法國與荷蘭分別公投否決歐洲憲法後，制憲運動和歐洲統合頓時陷入危機，要等到 2007 年 1 月德國接任歐盟輪值主席國，同年 5 月法國總統大選結束後，歐盟 27 國領袖才在 6 月柏林高峰會上達成協議，召開政府間會議，10 月里斯本高峰會通過新約，然後於 12 月正式簽署。 2009 年 10 月 2 日愛爾蘭二次公投通過里斯本條約後，歐盟 27 國已完成里斯本條約的批准程序，僅待愛爾蘭、捷克、波蘭和德國將批准書存放至義大利外交..

The European integration as well as the EU Constitution-Building was in an impasse in the aftermath of the negative results of the French and Dutch referenda in mid 2005. It was not until the new German government under the leadership of Angela Merkel assumed the EU presidency in January 2007 and the French elected a new President in May of the same year that EU and its member states began working effectively to find a solution to put an end to this crisis. The Berlin European Council in June 2007 finally adopted the compromi..