A city's walls carry a running, unofficial record of who claims visibility in public space and on what terms. Graffiti tags, political slogans, commissioned murals, and informal memorials all compete for the same surfaces, often layered directly on top of one another over time.
Anthropologists who study these markings pay attention not just to what is depicted, but to placement and permanence: a tag scrawled at eye level on a residential wall communicates something different than a large commissioned mural on a cultural center, even when their visual styles overlap.
Informal memorials — flowers, photographs, and hand-painted messages marking a death by violence or accident — turn ordinary street corners into temporary sites of collective mourning, visible to an entire neighborhood long after formal rituals have ended.
Reading a city's walls ethnographically means treating visual culture as a genuine form of urban speech: who is allowed to speak on which surfaces, who erases what, and how quickly, tells its own story about power in public space.