This book argues that we need to recognize the historic monument as a tangible aspect of a holistic expression of culture that is rooted in specific spatio-temporal conditions. However, since the latter are constantly changing, it is vital to identify an implicit contradiction with the goals of conservation. By examining three major heritage monuments - the Pantheon, Teotihuacan's Sun Pyramid and Alhambra - the book shows how these sites are the product of multiple strategies and unforeseen agents, accumulated through history.