One of the earliest portrait photographs -- a daguerreotype -- represents the Danish artist Bertel Thorvaldsen. In spite of the fact that the photograph is signed and dated there has been doubts about the dating and the location of the taking of the picture. Starting from the photography itself as well as the historical facts the author sets the photography in its proper context. Written sources material and other pictures are presented to throw light on the photographer, the French businessman A C T Neubourg's work in Scandinavia. Furthermore, the reader gains an insight into the exposure as...