architectural theory which are based on linguistic analysis, philosophy, post-structuralism, or cultural theory. For instance, there is emerging interest in the re-discovery of the post-modernist project Sam Jacob, in the definition of new radical tendencies of architecture and its implication in the development of cities (Pier Vittorio Aureli), in the embrace of the idea of discipline and in a new formalist approach to architecture through the appropriation of concepts from the Object Oriented philosophy. It is too early, however, to say whether any of these explorations will have widespread or lasting impact on architecture. In the second decade of the twenty-first century, there is the emergence of architectural theory based on the frameworks of social reproduction theory and care ethics. This approach is introduced in Doina Petrescu's and Kim Trogal's edited a volume on the Social (Re)Production of Architecture and in the volume Critical Care. Architecture and Urbanism for a Broken Planet edited by Angelika Fitz and Elke Krasny. Some architectural theorists Historical Vitruvius Varāhamihira Bhoja Li Jie Leon Battista Alberti Andrea Palladio Sebastiano Serlio Gérard Desargues Filarete Francesco di Giorgio Martini Teofilo Gallaccini Marc-Antoine Laugier Antoine-Chrysostome Quatremere de Quincy Giambattista Piranesi Carlo Lodoli Francesco Milizia John Ruskin Horatio Greenough Eugène Viollet-le-Duc Karl Friedrich Schinkel Paul Sédille Hermann Muthesius Frank Lloyd Wright Formalism and space Hans Auer Konrad Fiedler Henri Focillon Paul Frankl Adolf von Hildebrand Emil Kaufmann Theodor Lipps Alois Riegl Geoffrey Scott August Schmarsow Gottfried Semper John Summerson Robert Vischer Heinrich Wölfflin Wilhelm Worringer Hans Van der Laan Modernist Reyner Banham Ernesto Nathan Rogers Bruno Zevi Sigfried Giedion Leonardo Benevolo Steen Eiler Rasmussen Otto Wagner Le Corbusier Adolf Loos Lewis Mumford Edoardo Persico Raymond Unwin Ebenezer Howard Rudolf Arnheim Lúcio Costa Frank Lloyd Wright Postmodern and contemporary Christopher Alexander Stan Allen Pier Vittorio Aureli Michael Benedikt Andrea Branzi Lori Brown Patrizio Ceccarini Preston Scott Cohen Beatriz Colomina Peter Cook (architect) Gillo Dorfless Nader El-Bizri Peter Eisenman Hal Foster (art critic) Kenneth Frampton Marco Frascari Sarah Williams Goldhagen K. Michael Hays Hilde Heynen Mark Jarzombek Charles Jencks Jeffrey Kipnis Rem Koolhaas Elke Krasny Leon Krier Sanford Kwinter Catherine Ingraham Sylvia Lavin David Leatherbarrow Marc Linder Christian Norberg-Schulz Werner Oechslin Juhani Pallasmaa Alberto Pérez-Gómez Paolo Portoghesi [[Sarah Robinson Aldo Rossi Colin Rowe Joseph Rykwert Yehuda Safran Denise Scott Brown Richard Sennett Daniel Sherer Robert Somol Deyan Sudjic Manfredo Tafuri Robert Tavernor Panayotis Tournikiotis Peter Trummer Bernard Tschumi Oswald Mathias Ungers