This book is meant to look at architecture considering its invisible side - connected to its intensity, to its unmanifested potentialities, to the spatial and temporal superpositions that it carries and that infuse places, situations, objects with a specific cultural memory. Identified as a capacity to temporarily manifest a virtual potential that architecture carries, this intensity is seen as a regenerative and transformative dimension, which the real carries. In visual and written forms, the explorations of space and construction processes that are gathered here show and reinforce the effectiveness with which this virtual potential of our immediate experience manifests itself. At the same time, this book intends to gather possible directions of understanding and concrete approaches of the virtual, which do not rely on digital media.