Book excerpt: This book provides a comprehensive overview of cultural heritage, including urban and architectural heritage in cities worldwide. It highlights the importance of studying “urban conservation” and the effects of increasing population growth in contemporary cities, which causes expansion of modern urban land use, especially towards the historical centers and districts of cities. Preserving architectural and urban heritage is very important in illustrating the concept of “dual cities,” in which the old parts preserve their architectural style while the modern part of the city is being developed in the same heritage style. The book is organized into three sections on: “Urban Heritage within Urban Renewal Policies”, “Conservation of Urban and Architectural Heritage”, and “Loss of Identity, Cultural and Architectural Heritage”.