Christian Schad created what were probably the world's first artistic photograms and abstract photographs. The third volume of his catalogue raisonné is dedicated to his so-called 'Schadographs'. Schad arranged materials - including waste paper, fabric remnants, or even lint - on light-sensitive paper and exposed these with the help of the sun shining on the windowsill. The results are abstract compositions in the experimental spirit of Dada.