Courtyards are among the most versatile elements of architectural design. With their wide range of sizes and shapes, they are integral components of every conceivable type of constructional project. Some are reserved for private use while others serve the general public. Basically, their main function consists of structuring a building and to provide illumination and ventilation to dense spatial depths. Beyond that, they provide an defined and protected outdoor space that in itself is part of the architectural or landscape design. Based on selected case studies, this volume presents the design diversity of courtyards, focusing in particular on their expedient multifaceted use.