Till Boettger University of Applied Sciences and Arts (HAWK) in Hildesheim Faculty of Building and Conservation, Professor of Representation/Design, dissertation on threshold spaces, freelance architect, also founder and managing director of the architecture firm at11 - architecture and design, author, spatial researcher, carpenter. Ulrike Knauer Hildesheim University of Applied Sciences and Arts (HAWK), Germany Faculty of Building and Conservation, research assistant for presentation/design.