Dr. phil. habil. Chistopher Dell is a theorist/conceptualist in urban design and architecture, a musician and a composer. Since 2000, Dell has been head of the Institute for Improvisation Technology in Berlin. He held professorships in Urban Design Theory at the HafenCity Universität Hamburg, the Technical University Munich and the University of Fine Arts, Berlin. In 2017 he has been appointed as Member of the North Rhine-Westphalian Academy of Sciences, Humanities and the Arts. Dell’s work is instigated by motives of the contemporary city. Dell understands the city as an improvisational process, that comes about through actors, things, actions, discourses and vectors on sites. Being driven by motives, his work can take on different forms – such as writing a book, teaching urban design and architecture theory, playing or composing music, publishing a sound medium, lecture-performing, creating a sound installation, curating exhibitions or making objects.