Between Theory and Practice in Architectural Design: Imagination and Interdisciplinarity in the Art of Building examines the intersection of philosophy and practice in architecture, exploring life, viability, and interdisciplinary collaboration and offering practical design insights for all beings. This book highlights several key architectural features, including a philosophical exploration of life, a focus on creating organic spaces, and the use of the viable system model (VSM) for organisational resilience. Additionally, it emphasises interdisciplinary design thinking and introduces a platform for viable and agile AI-assisted design. The book provides practical case studies highlighting how theory and practice can be integrated into architectural projects, giving architects actionable insights for innovative, adaptive, and purposeful design. By utilising organic design principles and interdisciplinary collaboration, readers will gain a transformative understanding of architecture. The book encourages the application of the viable system model to enhance organisational viability while promoting flexibility and viability in design. Furthermore, architects are encouraged to use logic-based and object-oriented ontology (OOO)-based AI-assisted design approaches due to their ability to evaluate design scenarios quickly. This book will be of interest to architects, designers, and enthusiasts seeking a comprehensive understanding of architecture, and professionals in architectural enterprises looking to enhance organisational viability will find value. Interdisciplinary collaboration is emphasised throughout the book. Students and academics in architecture and related fields will also benefit from its philosophical exploration and practical insights.