Readers interested in early photography may enjoy Daguerreobase, where visitors can explore more than 16,000 daguerreotypes held by museums and in private collections all over Europe. This vast database can be searched by keyword and filtered by fields such as date and name of the specific collection where the daguerreotypes are held, such as Det Nationale Fotomuseum in Denmark. Readers may also be interested Daguerreobase's free 70-page ebook (found in the About Daguerreobase section) which explains the project and gives background information about the history and technique of daguerreotype photography. In addition to being a place to view daguerreotypes, Daguerreobase is a "collective cataloguing tool for daguerreotypes" that allows individuals, as well as organizations, to "edit and store records of individual daguerreotypes and establish relations to other records based on a wide range of characteristics." The records for individual daguerreotypes can be highly detailed and may contain metadata on the daguerreotype itself, as well as on its housing and gallery information. At the time of this writing, Daguerreobase is a collaborative project between seventeen partners in thirteen European countries.