Kevin Lynch’s The Image of the City argues that urban form matters because people do not experience the city as an abstract plan, but as a sequence of remembered, navigated and emotionally charged images. Lynch’s central concept is imageability: the capacity of a physical environment to produce a vivid, coherent and useful mental image for its inhabitants. A legible city is not merely beautiful; it enables orientation, security, memory and social communication. The city, for Lynch, is perceived over time, through movement, habit and association, so urban design must consider how paths, edges, districts, nodes and landmarks help citizens organise their surroundings. His studies of Boston, Jersey City and Los Angeles show that different urban forms generate different degrees of clarity. Boston, for example, possesses memorable districts and landmarks such as the Common, Beacon Hill and the Charles River, yet its irregular paths create confusion. Jersey City, by contrast, appears fragmented, with weak symbolic identity and few shared reference points. Lynch’s argument is therefore not that cities should be simplified into rigid order, but that they should offer an open-ended structure strong enough to support exploration and meaning. The mental image of the city is produced through interaction between observer and environment: people select, organise and remember what they see, while the built form either assists or obstructs that process. Ultimately, Lynch presents urban design as a human-centred practice concerned with perception as much as function. A city should be readable without becoming dull, complex without becoming chaotic, and distinctive enough to become part of everyday memory. His work remains important because it shows that the quality of urban life depends not only on infrastructure or efficiency, but on the legibility through which people feel oriented, attached and present in the city.