Kalenderschild van een kalender voor 1913 van het Instituut Jacob van Campen 1912

This poster, designed by Walter van Diedenhoven in 1912, is a calendar cover for the Instituut Jacob van Campen in Amsterdam for the year 1913. It features an intricate design with stylized floral motifs, a central abstract shape, and a border adorned with the letters of the alphabet, possibly representing the months of the year. The poster exemplifies the Art Nouveau style with its flowing lines and organic forms, a popular artistic movement of the late 19th and early 20th centuries.