Software architecture involves the establishment of the foundational structures of a software system. It serves as a blueprint for both the system and the development project. It outlines the tasks involved in the design process. Throughout the initial stages of software development, four primary activities are repeatedly conducted, namely, architectural synthesis, architectural analysis, architectural evolution, and architectural evaluation. Common components of software architecture include software architecture erosion, architecture description languages, architecture frameworks, software architecture description, and architecture viewpoints. This book attempts to understand the critical aspects that fall under the discipline of software architecture and how such aspects have practical applications. It is compiled in such a manner, that it will provide in-depth knowledge about the theory and practice of software architecture. This textbook will serve as a reference to a broad spectrum of readers.