Abstract
Libraries belonging to CSIC, the "Marqués de Valdecilla" Historical Library and the Spanish National Library, contain a large number of printed material and manuscripts dealing with the history of chemistry. Those works are being included, together with many additional documents and pictures, in a searchable catalogue. This article is intended to inform researchers in the history of chemistry, scholars or whoever might be interested, of its availability on http://catalogochymico.icp.csic.es, as well as to provide a short description of few items, using them to make a trip through the history of chemistry.