The main intention of this book is to reveal some architectural solutions to (functional) re-usability of tall-buildings. It also aims to find new architectural methods of increasing the serviceable lives of these high-tech giants and their possible functional changes. Hence, It investigates the principal definitions, typology, history, problems and some significant examples of high-rise buildings from the perspective of re-usability. In addition, it focuses on some special case examples of high- rise buildings around the world used as hotels, offices, restaurants, conference halls etc. Indeed, the book suggests an ideal layout for organizing the structural features (e.g. columns, load bearing walls etc.) and utilities' ducts of high-rise buildings considering the concept of re- usability.