Perhaps no other figure exerted a greater influence on the urban transformation of Barcelona during the first third of the 20th century than Josep Puig I Cadafalch. If as an architect he constituted a perfect example of the tension posed between Modernism and Noucentisme, as a historian and archeologist he contributed to the recuperation of a significant part of Catalonia"s historical and patrimonial memory. Nevertheless, it was his awareness of town planning issues which contributed to the great metropolitan transformation of Barcelona, from the opening of Via Laietana to the development of the Placa de Catalunya. This volume includes both a biography and a chronology of works and projects.