People squeezed between endless rows of weathered walls, wandering through labyrinths of streets lined with dusty shop windows and riding dirty yellow trams-do they really notice street art?

Its paradox lies in the fact that it exists in plain sight while remaining almost invisible.

The more often a person walks down the same street, the fewer details they want to notice. Psychologists call this the habituation effect: the brain stops responding to familiar visual objects, freeing its attention for new information. That is precisely why a monumental mural that initially captivates the imagination becomes, after a few months, nothing more than part of the city’s background.

This applies not only to monumental painting. Tags, elaborate graffiti, small interventions tucked between traffic signs, artists’ stickers, or miniature objects attached to façades gradually dissolve into everyday life. The city continues speaking to us, but we stop listening.

Curiously, it is often the tourist who notices these works more readily than the person who has lived nearby for years. An unfamiliar environment encourages closer observation, while a familiar route gradually turns into a sequence of automatic actions.

One only has to learn to distinguish the different forms of street art once, and the perception of the city changes. Walls cease to be scenery. They become a text that can be read.

But first things first. Let us understand what graffiti, tags, and murals actually are.

The Anatomy of the Urban Text: From the Primitive Tag to Monumental Scale

The history of street art began long before the invention of aerosol paint.

Human beings have always sought to leave a trace behind. The prehistoric paintings in the Chauvet and Lascaux caves were not merely decorations-they recorded presence, experience, and memory. Long before paper existed, the wall became humanity’s first medium of communication.

Modern graffiti, however, was born in the late 1960s in the United States. It was then that an artist’s name first became a work of art in itself.

In Philadelphia, Darryl McCray, better known as Cornbread, began writing his pseudonym throughout the city. Almost simultaneously, a Greek-American courier in New York known as TAKI 183 left his signature together with the number of his street on subway stations across the city. Those few letters became the beginning of a culture that, decades later, would transform the visual identity of cities around the world.

Street art has long ceased to be a marginal gesture or an act of vandalism. Today it is a complex visual ecosystem that exists both inside and outside artistic institutions. It is one of the most democratic artistic languages of our time: it requires neither an admission ticket, museum etiquette, nor specialized knowledge, while possessing its own history, terminology, and system of codes.

For some, images painted on walls remain little more than visual noise. For others, they form a complete text that tells the story of a city, its inhabitants, and its time. To learn how to read this language, it is essential to understand how it emerged and why different images on walls have fundamentally different meanings.

To the casual passerby, nearly everything painted on a wall looks the same. To someone familiar with the culture, however, the difference between a tag, graffiti, and a mural is roughly the same as the difference between a poem, a novel, and architecture.

Tag – A tag is a signature. It is the most concise form of an author’s existence in space.

Graffiti is already an exploration of letterforms. Style, composition, and the plasticity of typography become essential. The letter itself becomes an independent artistic object.

A mural functions differently. Rather than focusing on letters, it turns toward imagery, interacting completely with architecture and often being created legally, with the support of cities, festivals, or cultural institutions.

There are also intermediate forms: quick throw-ups, elaborate pieces, and fully painted trains-whole cars and whole trains-which have become legends in cities such as New York and Berlin.

It is here that the two cultures begin to diverge.

While classical graffiti explores the form of letters, street art speaks primarily through ideas. Walls become populated with characters, political statements, ecological manifestos, irony, poetry, and social criticism. One artistic practice explores language; the other explores meaning.

Why Artists Choose Enormous Walls

It is particularly fascinating to observe how attitudes toward scale have evolved.

The journey from a small tag on a mailbox to a twelve-story mural is not simply a matter of artistic growth. It represents an entirely different way of engaging with the city.

A monumental mural cannot be experienced in the same way as a painting inside a museum. Standing before it, a viewer quite literally changes the position of their own body. One must step back dozens of meters, raise one’s head, walk along the façade to grasp the composition in its entirety. The artwork ceases to exist within a frame and instead becomes part of the architecture itself.

There is something almost religious about this experience of scale. Like medieval cathedrals or Renaissance frescoes, monumental images compel viewers to become aware of their own physical relationship to space.

That is why monumental painting has always possessed a unique power-from the Mexican muralists Diego Rivera and David Alfaro Siqueiros to the contemporary façades of Berlin, Lisbon, and Mexico City.

But scale is equally important to the artist.

For a graffiti artist, the city is a space that constantly resists. Every new surface becomes a dialogue with architecture. The more difficult the location-a rooftop, a bridge, a train, or an industrial site-the greater the feeling of overcoming resistance.

A tag becomes a way of saying – I exist.

A monumental piece says something different – This place can no longer be imagined without my presence.

During the preparation of this article, our editorial team met the artist Caro Pepe, the creator of monumental murals and painting series. She admits that she naturally thinks in large formats, yet not every idea finds its wall. In those moments, the city gives way to canvas. For her, this is not a compromise but a continuation of the same artistic language. If murals converse with an entire city, paintings establish a quieter, almost intimate dialogue with the viewer. Yet in both, what remains essential is the sense of movement, emotion, and stories that invite us not simply to look, but to experience them.

How Graffiti Became One of Contemporary Art’s Defining Artistic Languages

Only twenty years ago, there was a clear division: the street belonged to graffiti, while the museum belonged to contemporary art. Today, that boundary has almost disappeared.

Many artists now work simultaneously in both environments. The French artist JR began with illegal photographic interventions on the streets of Paris and today creates projects for some of the world’s leading museums. The Brazilian duo Os Gêmeos, who emerged from São Paulo’s graffiti culture, have become participants in major international biennials. Banksy continues to work in public space, yet his works have long since entered the history of contemporary art and regularly appear at major auctions.

But the movement also works in the opposite direction. Artists who first gained recognition in museums and galleries are increasingly turning toward the urban environment as a place where an artwork exists not in the isolation of the white cube but within the living context of the city.

The street has ceased to be an alternative to artistic institutions. Today it has become one of the most important platforms for contemporary art.

Ultimately, it is worth acknowledging that the city’s public space and the sterile white cube of the gallery are no longer opposing camps. They have become two sides of the same coin-two parallel ways in which the contemporary artist exists.