The forth volume of the Conversations in Villa Decius series was published under the title: Weimar Triangle and Ukraine. European Models of Integration and Regional Cooperation. The book is a record of conference held under the same title in Villa Decius on 24-26 May 2003. It contains speeches, experts’ presentations and discussions among experts and students – conference participants. The book published in English thanks to the financial support of Robert Bosch Foundation and Foundation of Polish-German Cooperation.