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4.1
70 reviewsA City Is Not a Tree is a widely cited 1965 book by the architect and design theorist Christopher Alexander, first published in the journal Architectural Forum, and re-published many times since. A City is Not a Tree has been widely described as a landmark text, and the Resource for Urban Design Information calls it "one of the classic references in the literature of the built environment and related fields".
Its core contention is that urban planners tend to design cities as tree diagrams (with each node only having a relationship with a parent node), while successful unplanned cities have a semi-lattice structure (where each node has relationships with many nodes).