Street Architecture is an ethos based not on a proposed urban theory, but on urban observation. It is like a puzzle formed of pieces of various scales, representing an array of forces from the client’s brief to the builder’s hand. Karin Templin examines the residential designs of the Dutch architect Hans van der Heijden in the context of housing and urban design practice as observed in the street architecture of Florence and other European cities. She provides insights into his design approach and on the principles of Street Architecture which could be of interest to urban architects and students, as well as developers and planners. With an introduction by the German architect Hans Kollhoff.