Revision with unchanged content. There are countless methods for how to proceed in a design process. Any sort of 'perspective' or 'point of view' can create the basis for a design. The ques?tion is the relevance of this foundation. Ontology can be a relevant founda?tion of a design strategy. Further, architecture can be a tool of human self-understanding in the world. Understanding this connection can lead to a conscious construction of environment. The study of ontology in the context of architecture seeks to develop tools that help create this environment of self-awareness and awareness of an ontic-ontological reality. The investigation that results in the concept of ontic space begins with the analysis of metaphysics and ontology. Various philosophical systems as well as Gestalt theory are studied in order to establish a categorical structure for the analysis of architectural space and design, which is tested throughout this investigation. This book is directed towards instructors, students, and researchers in archi?tecture and related design fields. It is also relevant for design profes?sionals interested in the theoretical basis for design concepts and philosophi?cal pers?pectives on the design process.