Definitions of space are as diverse as the disciplines in which it plays a fundamental role; from science and philosophy to art and architecture, each fieldβs perception of space is often simplified or reduced. This consequently denies access to βnew spacesβ, whose definitions and perspectives, strategies and impacts on human perception are rarely considered in any cohesive manner. This is where the Aedes Network Campus Berlin (ANCB) programme βNo Space Without Traitsβ came in: particularly through artistic approaches, it aimed to open doors into spatial worlds that until now have remained closed. The symposium βPERCEPTION in Architecture. HERE and NOWβ was part of this programme and invited critical and comprehensive contributions by academics, artists, architects, designers and curators. These presentations are brought together in this volume to reflect upon new spatial concepts and thus access βnew spacesβ of perception in architecture. The symposium stimulated a discourse focused on spaces as a collective entity, notions of spatial truth, the multiplicity of experience, and Wahrnehmnungsapparate, as well as physical, visual, acoustic and virtual manifestations of space in relation to social, cultural, historical and political forces.