About the Guest-Editors Christopher CM Lee and Sam Jacoby Christopher CM Lee and Sam Jacoby are the co-directors of thenew postgraduate Projective Cities Programme at the ArchitecturalAssociation (AA) School of Architecture inLondon(projectivecities.aaschool.ac.uk), which is dedicated to aresearch- and design-based analysis of the emergent andcontemporary city. They have taught together at the AA since 2002and their investigation of the city, undertaken in Diploma Unit 6from 2004 to 2009, has been published in Typological Formations:Renewable Building Types and the City (AA Publications, 2007). Thework has also been widely exhibited, including at the 10thArchitecture Biennale in Venice (2006) and as a solo exhibition atthe UTS Gallery in Sydney (2009). Christopher CM Lee is the co-founder and principal of SerieArchitects. He graduated with an AA Diploma (Hons), has previouslytaught Histories and Theories Studies at the AA (2009-10) and wasUnit Master of Intermediate Unit 2 from 2002 to 2004- and DiplomaUnit 6 from 2004 to 2009. He is pursuing his doctoral research atthe Berlage Institute in Rotterdam on the topic of the dominanttype and the city. The relationship between architecture and the city is a problemthat has informed Sam Jacoby's teaching in collaboration withChristopher Lee and his professional work. Jacoby is also theco-director of the Spring Semester Programme at the AA where healso previously taught History and Theories Studies. He was also astudio leader in the BArch programme at the University ofNottingham. He is currently completing a doctoral degree at theTechnical University of Berlin on the topic of Type and theSyntax of the City'. In this issue of 2 on Typological Urbanism, Lee and Jacobyrecognise the city as a contemporary field, an area of study, and adesign and research agenda, bringing together the work and researchof contemporary professionals and academics that speculates on thepotential of architectural experimentation and the meaningfulproduction of new ideas for the city.