L'Observatori de l'Ebre, una institució singular Authors Antoni Roca i Rosell Abstract The Ebro Observatory was set up in 1904 in Roquetes, in the south of Catalonia, at the Ebro river. The Observatory was linked to the College of the Jesuits, that was then in Tortosa. The extraordinary features of the history of the Observatory explain its continuity, but also a number of difficult circumstances. This communication presents some reflections after the publication of a book celebrating the centenary of the centre. Downloads Text complet (Català) Published 2009-12-02 Issue Nova època, vol. 2 (1) : 2009 Section II Conference on the History of Astronomy and Meteorology License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Actes d’Història de la Ciència i de la Tècnica, authors accept the following terms:Authors assign to Societat Catalana d’Història de la Ciència i de la Tècnica (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Actes d’Història de la Ciència i de la Tècnica.Authors answer to Societat Catalana d’Història de la Ciència i de la Tècnica (SCHCT) for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.SCHCT declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.Actes d’Història de la Ciència i de la Tècnica is not responsible for the ideas and opinions expressed by the authors of the published articles.