From February 16 to 21, the seminar Visualizing Data on Non-Flat, Non-Rectangular Displays took place at Schloss Dagstuhl. This interdisciplinary seminar was organized by Raimund Dachselt together with Anastasia Bezerianos (Université Paris-Saclay, INRIA, CNRS, FR) and Wesley J. Willett (University of Calgary, CA). Among the 23 participants was also our group member Ricardo Langner and our former colleague Konstantin Klamka, who both received an invitation to the seminar.