BRICK BY BRICK

DUOMO DI MILANO: AN ARCHIVE OF DECISIONS

ELENA BOERI

April 9, 2026

A building begun in 1386 and never fully completed stands at the center of a city that has repeatedly constructed its own versions of permanence, from the monumental certainty of the Milano Centrale railway station to the provisional spectacle of San Siro Stadium. What appears as architecture resolves into something else: a sequence of structures that organize collective life, each bound to a different sense of time, suspended between duration and modernity’s persistent demand for resolution.

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I had been to Milan many times, and had crossed the square in front of Milan Cathedral a hundred times while making my way through the city. It is never the destination. It is something one passes through, like a corridor that has grown too large for its original function. The square is always occupied, but never crowded in any particular way. People move through it without stopping, adjusting their direction slightly to avoid one another, as if following lines that are not marked but understood. There are pigeons, of course, and the intermittent sounds of footsteps against stone, which seem louder than they should be, as if the surface amplifies movement rather than absorbs it.

At one edge, the square opens almost immediately into the flow of commerce, into the beginning of a series of busy shopping streets where movement accelerates and attention disperses into shop windows, fast-food restaurants, displays, and the small calculations of everyday consumption. Adjacent to it stands the grand Galleria Vittorio Emanuele II, whose glass-vaulted interior channels that movement more deliberately, transforming passage into a kind of staged circulation. Constructed between 1865 and 1877 and often described as one of the first modern shopping arcades, the Galleria links the Piazza del Duomo to the Teatro alla Scala, Milan’s iconic opera house, binding together commerce, performance, and movement within a single architectural gesture. Its position beside the cathedral is not incidental but part of a deliberate nineteenth-century urban project, placing the religious, the civic, and the commercial in immediate proximity, aligning older forms of collective gathering with the emerging logic of consumption and modern urban life. What was once a relatively unremarkable urban space, a working city square marked by traffic, dust, and the ordinary frictions of movement, has been gradually redefined as a site of arrival. This transformation parallels the broader shift in Milan itself, from a city long considered secondary within the European hierarchy to one that now positions itself as a cosmopolitan center, often invoked just after Paris in discussions of cultural and economic influence in the Eurozone. The square has been cleaned, regulated, pedestrianized, its surfaces restored and its flows reorganized. What was once a transitional space has become a destination.

An eternal argument about what it would become.

I remember that I rarely looked up. The facade was there, unavoidable, but it registered more as a condition than an object. Something pale and intricate at the edge of vision, too elaborate to take in at once and therefore easier to ignore. It did not insist on attention so much as assume it would be given at some other time, by someone else, under different circumstances. The Duomo is, in fact, something of an anomaly in Milan, a city otherwise defined by architecture that tends to announce, with unusual clarity, the moment of its own construction—namely late nineteenth-century expansion or mid-twentieth-century reconstruction, the sober languages of industry and postwar modernity. Much of Milan does not conceal its origins; it declares them. Its buildings are less concerned with timelessness than with position, with belonging to a specific phase in the city’s ongoing negotiation with capital, production, and renewal.

Against this, the Duomo appears almost suspended, less a building within time than one that has slipped slightly outside of it. It does not align easily with the surrounding fabric, not because it is older—many European cities contain older structures—but because it seems to resist incorporation into the narratives that organize Milan’s architectural identity. Whereas the rest of the city tends toward legibility, toward a kind of historical transparency, the Duomo accumulates time differently, less as sequence than as density.

Now, in the third decade of the twenty-first century, Milan is once again in a phase of accelerated growth. The city expands not only outward but upward, with new districts emerging at the edges and in former industrial zones, and skyscrapers appearing with a speed that suggests sudden assertion. Glass and steel surfaces reflect a city increasingly oriented toward finance, design, and global visibility, taking forms calibrated to signal contemporaneity in the most immediate sense.

A beginning, dated but never resolved.

Yet this new phase does not erase what came before; it layers itself over it. Milan is a city of overlapping temporalities, where the nineteenth century, the postwar decades, and the present moment coexist without fully resolving into a single narrative. In this context, the Duomo’s strangeness becomes more pronounced. It is not simply a historical monument at the center of the city, but something closer to a counterpoint—a structure that does not so much anchor Milan as unsettle it, reminding us that the city’s relationship to time has never been entirely linear, nor entirely coherent.

The cathedral does not belong to a single moment, nor does it announce its historical position with any precision. It stands there, central and unavoidable, and yet slightly out of register with the rest of the city, as if it had been placed there from elsewhere, or had arrived from another time and remained.

Construction began in 1386. The date is precise, but its precision is misleading. It suggests an origin, a beginning that can be located and understood, but in practice, the project exceeded any such point. The initial decision to build, attributed to Gian Galeazzo Visconti, set into motion something that would quickly detach itself from the intentions of those who began it. The cathedral was conceived in the Gothic style, but not in the manner of the French cathedrals from which that style was derived. It was adapted, extended, translated into a Lombard context, and then continually modified. What is often described as Gothic was almost immediately already something else, a form that carried within it multiple adjustments, revisions, and reinterpretations.

Commerce slips in beside the sacred, under glass and iron.

The early phases of construction were ambitious, but ambition in this case did not guarantee continuity. Work proceeded unevenly, interrupted by political shifts, financial constraints, changes in leadership, changes in taste. Architects came and went. Plans were drawn, revised, abandoned. What persisted was not a unified vision, but a commitment to continuation. The building was not executed so much as it was sustained.

This is perhaps the first difficulty in understanding the Duomo: It resists the idea of authorship. There is no single architect whose name can stabilize it, no moment of design that can be identified as definitive. Even the style, if one insists on calling it Gothic, does not function as a stable category. It is Gothic extended across centuries, filtered through different sensibilities, subjected to changing expectations. The facade, which appears so cohesive when seen from a distance, was in fact completed much later, in the nineteenth century, under Napoleon’s directive. It is both part of the original project and a historical addition, an attempt to resolve something that had remained unresolved for centuries.

Those who began the cathedral could not have expected to see it completed, and yet they began it nonetheless. This is often interpreted as a form of faith, an investment in a future extending beyond the individual lifespan. But it is also a condition of most work: to participate in a project whose completion is not available to you. The Duomo was built on this premise. Each generation contributed to something it could not finish, inherited something it did not begin.

To say that the cathedral is unfinished is both accurate and misleading. It is not unfinished in the sense of being incomplete or abandoned. There are no visible gaps, no obvious signs of interruption. It functions as a cathedral. It can be entered, used, photographed, consumed as an object. And yet it is not finished. Work continues in the quieter, more persistent activities of maintenance, restoration, cleaning. The marble, which gives the building its distinctive pale surface, requires constant attention. Pollution darkens it, weather erodes it, details deteriorate and must be replaced. Statues are removed, repaired, reinstated. Surfaces are cleaned, sections renewed. The building persists only because it is continuously worked on.

What this produces is a peculiar condition: a building that is always present, always functioning, and yet never fully complete. The idea of completion, in this case, becomes less a factual state than a perceptual one. Visitors encounter the cathedral as finished because they are not present for its duration. They see it in a moment, isolated from the processes that sustain it. Photographs reinforce this illusion. They capture the facade, the spires, the square, and present them as stable, resolved, available.

I stopped on a morning that did not differ in any obvious way from the others. Not out of intention, but because the movement of the square seemed, briefly, to slow. The light was flat, without contrast, and the surface of the cathedral appeared less like stone than like a record of repeated gestures. Details emerged that had previously dissolved into one another: figures, edges, small accumulations of ornament that did not resolve into a single image but remained separate, as if added at different moments without a plan that could be perceived in retrospect.

What became difficult to ignore was not the scale—the largest Gothic cathedral ever constructed, larger in footprint even than the Vatican’s Saint Peter’s Basilica—but the sense that the building did not belong to a single time. It did not present itself as something completed, even though nothing appeared unfinished. There were no visible interruptions, no exposed structures, nothing that would suggest an ongoing process. And yet the surface seemed to resist the idea that it had ever been otherwise.

For instance the spires, which define the cathedral’s silhouette, are often described as a forest, and the metaphor is not entirely misplaced. They proliferate, repeat, vary slightly from one to another, creating a density that is difficult to parse. Each spire carries its own set of figures, its own decorative program, its own minor deviations. From a distance, they form a coherent image. Up close, they dissolve into multiplicity. This oscillation between coherence and fragmentation is central to the building’s effect. It is never fully legible. It cannot be taken in at once.

The station repeats the cathedral’s logic, only faster and without faith.

If one looks beyond the Duomo, the city offers other structures that have, at different moments, assumed a similar role, though under altered conditions. The Milano Centrale railway station, largely completed in the 1930s under Benito Mussolini, presents itself with a comparable sense of scale and inevitability, but its logic is entirely different. Whereas the cathedral distributed its construction across centuries, the station compresses its ambition into a single monumental gesture. Its architecture, often described as a hybrid of late Art Deco and stripped classicism, stages power through mass, symmetry, and exaggerated scale. It is not extended in time but fixed in it, a product of a regime that sought to render its authority visible and immediate. Arrival and departure are organized with precision. Movement is directed, framed, and controlled. If the Duomo accumulates, the station imposes.

More recently, San Siro Stadium has taken on a comparable function, though in a perhaps more provisional register. Built in 1926 and expanded significantly in the postwar decades, its current form, with its exposed spiral ramps and structural additions, belongs to a late twentieth-century language that approaches what might be called postmodern, or at least post-heroic. It does not conceal its infrastructure but displays it, turning circulation into spectacle. On match days, it gathers up to 85,000 spectators, producing a collective intensity that rivals any earlier form of assembly. And yet its future remains uncertain. Plans to dismantle it and replace it with a new stadium suggest a different relationship to time, one in which even structures of this scale are understood as temporary, subject to cycles of renewal and obsolescence.

All of these buildings can be understood as cathedrals of their moment, not because they replicate the form, but because they concentrate the dominant energies of their time—faith, power, movement, spectacle—into a space that exceeds ordinary use. What distinguishes the Duomo is not simply its age, but its refusal to resolve into a single moment of meaning. It does not represent its time. It accumulates time, and in doing so, remains out of alignment with the succession of structures that have followed it.

A football stadium that treats its own skeleton as the main attraction.

This is where the comparison to other forms of architecture in Milan becomes useful. Much of the city’s built environment operates according to a different logic. Buildings tend to assert their structure, their materials, their relation to function. They are legible as products of a specific moment, a specific set of conditions. Even when they are complex, they are bounded. They have edges, limits, a sense of completion that corresponds to their design.

The Duomo exceeds its own design, not because it is larger, but because it is extended in time. Its complexity is not only spatial, but temporal. It accumulates rather than resolves. It is less a building than a process that has been made visible and then stabilized just enough to be perceived as an object. One begins to understand that what is being encountered is not architecture in the usual sense, but something closer to an archive—not of documents, but of decisions, of interventions, of adjustments made over centuries. Each element of the building can be understood as the result of a particular moment, a particular set of constraints, a particular interpretation of what the cathedral should be. These moments are not unified. They coexist in layers, sometimes in tension with one another.

The facade, only completed in the nineteenth century, attempts to impose a kind of order on this accumulation. It presents a unified surface, a coherent image that can be apprehended at once. And yet this unity is, in a sense, retrospective. It is an effort to bring into alignment something that had developed without a single guiding plan. It is both part of the building and a commentary on it. To regard it is therefore to confront a contradiction. It appears as a finished object, but it is the result of an ongoing process. It is stable, but it is sustained by continuous intervention. It belongs to the city, but it does not align with its dominant architectural language. It has an origin, but that origin does not define it.

This contradiction is not resolved. It is managed, maintained, made acceptable through familiarity. One crosses the square, one glances at the facade, one registers the presence of the building without engaging with its duration. It is part of the background, a constant that does not require attention. And yet, once seen differently, it becomes difficult to return to that previous state. In this sense, the Duomo offers a model of construction that differs from the one that dominates contemporary thinking. It is not driven by efficiency, by deadlines, by the need to deliver a finished product. It is driven by continuation. It accepts delay, interruption, revision as part of its structure. It aims not to arrive, but to persist.

Ornament pushed to the point where structure almost disappears.

This is not to romanticize the process. The delays, the interruptions, the changes in plan were often the result of conflict, of scarcity, of uncertainty. The building was not smoothly extended across time. It was repeatedly stalled, redirected, contested. What is remarkable is not the absence of difficulty, but the persistence of the project despite it.

One might say that the cathedral was never designed to be finished in the way we understand completion today. Its scale, its complexity, its reliance on materials and techniques that required time and labor beyond the capacity of a single generation all point to a different conception of building—one that assumes continuity rather than closure.

This has implications for how the building is experienced. It cannot be fully known in a single visit, or even in repeated visits. It exceeds the time of the observer. It requires a different form of attention, one that is willing to accept partial understanding, to recognize that what is being seen is only a moment within a much longer sequence. I began to understand that what I had been crossing all those times was not simply a square, and what I had been passing was not simply a building, but a situation in which duration had been made visible and then concealed again, depending on how one chose to look. The movement across the square remained the same. What changed was the recognition that the object at its edge had never fully arrived. It was begun long before any of us, and it will continue, in one form or another, long after.

Elena Boeri (b. 1986 in Milan) is an architectural historian specializing in structures of extended duration—buildings as ongoing processes rather than finished objects. Educated at the Politecnico di Milano and IUAV in Venice, she writes on the urban zone between Turin and Venice as a site where different notions of permanence coexist, often focusing on structures that resist completion. She teaches at the Scuola di Studi Urbani Avanzati in Milan and at the Institut für Stadtforschung und Zeitlichkeit in Berlin.

Cover image: A facade that took centuries to arrive yet insists on appearing instantaneous.