The first evaluation campaign of the Cross-Language Evaluation Forum (CLEF) forEuropean languages was held from January to September 2000. The campaign culmi-nated in a two-day workshop in Lisbon, Portugal, 21ñ22 September, immediatelyfollowing the fourth European Conference on Digital Libraries (ECDL 2000). Thefirst day of the workshop was open to anyone interested in the area of Cross-LanguageInformation Retrieval (CLIR) and addressed the topic of CLIR system evaluation. Thegoal was to identify the actual contribution of evaluation to system development andto determine what could be done in the future to stimulate progress. The second daywas restricted to participants in the CLEF 2000 evaluation campaign and to their ex-periments. This volume constitutes the proceedings of the workshop and provides arecord of the campaign