"Unified Architectural Theory" re-invents architecture by uncovering its forgotten languages. Organized in 44 sections, this book contains lecture notes and readings from a course based on Christopher Alexander's "The Nature of Order, Book 1", and using Salingaros' "A Theory of Architecture". It chronicles research results that can change our built environment for the better. Unified Architectural Theory is an innovative approach to the basis of architecture, permitting individual students and architects to assert their creativity in pursuing adaptive and sustainable design.The Czech and Nepali versions are offered by publishers in those countries. German and Spanish versions are underway. Selected chapters translated into Arabic, Portuguese, Spanish, and Urdu are available free online.