Julia Ellinghaus, Ph.D. (2006), art historian with a focus on iconography and Northern European art of the 17th and 18th century. Since 2018 she is research assistant at the Interdisciplinary Centre for Science and Technology Studies (IZWT) at the University of Wuppertal. Volker R. Remmert, Ph.D. (1997), studied history and mathematics. He teaches history of science and technology at the University of Wuppertal and has been director of the Interdisciplinary Centre for Science and Technology Studies (IZWT) since 2011. His research interests are in the history of early modern science and in the history of mathematics in the 19th and 20th centuries.