Typology—Paris, Delhi, São Paulo, Athens Over two years of academic research as Professors at the Swiss Federal Institute of Technology (ETH) in Zurich, Emanuel Christ, Christoph Gantenbein and their Research Team analysed a selection of 200 buildings from Paris, Delhi, São Paulo and Athens. This collection of 20th-century metropolitan and essentially unknown building development represents a systematic yet subjective compilation of urban architecture. Additionally, Rafael Moneo's historical essay "On Typology" provides a theoretical framework to the research. Review N°111 This is the third in a series planned over the coming years to explore themes arising from Christ & Gantenbein's own architectural work. Typology—Paris, Delhi, São Paulo, Athens is the second volume after Typology—Hong Kong, Rome, New York, Buenos Aires, published by the same authors in 2012.