Martha Cooper, the photographer whose pictures of New York's graffiti culture documented the movement at its origins, is still photographing decades after she first pointed her camera at the city's spray-painted subway cars and walls.

That is the headline fact, and it is worth pausing on. Careers in documentary photography rarely run this long with the subject intact. Cooper did not visit graffiti as a passing assignment; she was there when the writing on New York's trains was taking shape as a visual culture, and she kept working as that culture spread, changed and eventually entered museums, galleries and auction houses.

Her role in the story is foundational. The images Cooper made in the city during graffiti's formative years became, for many viewers around the world, the primary record of what the movement looked like before it was codified, marketed or canonized. Writers — as graffiti practitioners call themselves — gained visibility through her photographs in a way that the work itself, painted on surfaces that the city routinely buffed or repainted, could never guarantee. A subway car is a fugitive canvas. A photograph of a subway car is not.

That asymmetry sits at the center of Cooper's importance. Graffiti was designed to be seen but not necessarily to be preserved. The transit authority painted over it; the elements wore it down; whole cars disappeared from circulation. The photographer who documented the work performed a kind of accidental archiving, converting an ephemeral street practice into images that could travel, be reproduced and outlast the surfaces they depicted.

The fact that Cooper is still at it matters beyond biography. Graffiti's history is now contested terrain — claimed by institutions, monetized by brands, and reexamined by a generation of writers and scholars who were not alive when the first pieces went up on New York's trains. A photographer who witnessed the origins and continues to shoot brings continuity to a field where memory is often secondhand. Her continued presence behind the camera means the archive is not closed.

It also complicates any easy nostalgia. The New York that produced early graffiti — bankrupt, covered in tags, its subway fleet a rolling gallery — no longer exists. Photographers who return to a changed subject must decide what they are documenting: a tradition's persistence, its transformation, or its disappearance. Cooper's sustained attention suggests she sees the story as unfinished rather than sealed behind glass.

Her long career also frames a broader question about who gets credited in street culture's histories. The writers took the risks; the city criminalized their work; and photographers, publishers and eventually dealers built records and markets on top of it. Cooper's standing rests on having documented the practitioners seriously, at a time when the mainstream press largely treated graffiti as blight or vandalism. That choice — to photograph the work as work, made by named, skilled young artists — distinguished her output from municipal complaint and helped set the terms by which graffiti would later be understood as an art movement.

The Gothamist headline that reports her continued activity is, in its plain way, an event: it tells readers that one of the medium's most persistent witnesses is still producing. For historians of the movement, every year Cooper keeps shooting extends a primary record that cannot be reconstructed after the fact. For the photographers who followed her into street documentation, her endurance is a demonstration that this kind of work is a lifelong practice, not a phase.

Where the work goes next is the open question. As the original generation of writers ages and the city continues to remake itself, the value of an active eyewitness only increases. If Cooper's decades of photographs gave graffiti its origin story, her current work — whatever surfaces and writers it captures now — will determine how that story reads in its next chapter.