Paul Karl Wilhelm Scheerbart (8 January 1863 in Danzig – 15 October 1915 in Berlin) was a German author of speculative fiction literature and drawings. He was also published under the pseudonym Kuno Küfer and is best known for the book Glasarchitektur (1914). Scheerbart was associated with expressionist architecture and one of its leading proponents, Bruno Taut. He composed aphoristic poems about glass for the Taut's Glass Pavilion at the Werkbund Exhibition (1914).