This catalogue, comprising around 300 images, serves as a companion volume to the publication „Das zweite Original. Fotografische Kunstreproduktionen von Wilhelm Weimar“ (doi: https://doi.org/10.11588/arthistoricum.1682). All images from this publication can be found in the catalogue. The catalogue introduction presents the collection and scope of the convolute of glass negatives as well as other drawings and photographs by Wilhelm Weimar (1857-1917). The focus is on the collection of glass negatives by Wilhelm Weimar, which has been made available for the first time. From 1883 onwards, the first employee produced drawings and photographic reproductions of art objects from the Museum für Kunst und Gewerbe Hamburg. The book sheds light on the use and distribution of the photographs, their perception, and evaluates the impact of the transition from handmade to mechanical reproductions. The negatives and prints provide insights into the development of photographic technology around 1900 and reflect the desire at that time to produce images that were as objective as possible. Originally produced as illustrative material, they are now perceived as photographic objects in their own right: they have become second originals. But how can newly gained status be visibly continued in the digital environment?