Lithograph 'De Boompjes' from the series 'De Maas in Rotterdam', depicting the river Maas with a cityscape in the background. In 1893 Moulijn made his first lithographs. Over the years his occupation with drawing on stone grew more intensive and lithography was more and more the center of attention in his work. Peaceful rivers, woods, and parks are main subjects in his lithographs, but also fortresses and lively, urban landscapes of the harbor of his native town Rotterdam. In total the complete works comprise 189 lithographs. Moulijn’s use of lithography also influenced his way of painting and the execution of works in these fully different techniques gave him a special position in the Dutch art scene of the first half of the 20th century. [https://en.wikipedia.org/wiki/Simon_Moulijn]