Liechtensteiner Erich Allgäuer (b. 1939) was inspired to take his first steps in photography after a visit to Rome in 1960. Since then he has become passionate about photography, to the extent that he is never seen without a camera strung around his neck. Among his wide range of photographic themes are detailed images of the barks of plane trees which he has photographed all across Central Europe. In the mosaic which is typical of these tree barks, the artist was able to pick out human heads as well as whole figures and scenes. The “Woman” (value CHF 1.00) on the first special stamp is reminiscent of a theatre character, while the “Man” (value CHF 1.50) on the second stamp could have been an earlier emperor or philosopher. A modern “Woman with Hat” (value CHF 2.00) from Paris of the 1920s is the subject of the third motif. “The challenge is to detect one image among the hundreds of images on the tree and to then focus on it”, says Erich Allgäuer. “Only by defining the section will the motif become visible”. The artist is continually fascinated by the expressive power of the motifs, which even without accompanying text can be clearly read.