Vienna Secessionist calendar pages that came free if you bought a copy of the art magazine “Ver Sacrum.” Collections of the University of Heidelberg.

Februar. Image 10 of a 1901 issue of Ver Sacrum. Collections of the University of Heidelberg. Image © University of Heidelberg. Artwork itself in the public domain due to age. via https://digi.ub.uni-heidelberg.de/diglit/vs1901/0010/image
Maerz. Image 12 of a 1901 issue of Ver Sacrum. Collections of the University of Heidelberg. Image © University of Heidelberg. Artwork itself in the public domain due to age. via https://digi.ub.uni-heidelberg.de/diglit/vs1901/0012/image
April. Image 14 of a 1901 issue of Ver Sacrum. Collections of the University of Heidelberg. Image © University of Heidelberg. Artwork itself in the public domain due to age. via https://digi.ub.uni-heidelberg.de/diglit/vs1901/0014/image