Francisco Javier Sáenz de Oiza, 1950s–1990s

Stream Three · The Basque Library · Entry 09

He said he was born in the Middle Ages. It was not precisely a metaphor. Cáseda in 1918 — the year of his birth and of the Spanish flu pandemic that had sent his mother from Seville to her family’s village in Navarre for the delivery — was a place of bare stone houses, animals in the street, and no running water, a settlement whose relationship to the twentieth century was theoretical rather than practical. The medieval hermitage of San Zoilo sat two kilometres outside the village, its Gothic vaulting as present and alive as anything happening in Madrid or Barcelona. Oiza grew up in Seville, where his father worked as an architect for the land registry, but Cáseda stayed with him as a formation: the direct contact with stone, with rain and animals and the slow work of the seasons, with buildings that had not been designed so much as accumulated over centuries in response to use and weather. He believed, and said so repeatedly in interviews, that a village boy was more prepared than a city boy because he was more alone, more directly in contact with the material world, and because the material world taught things that no curriculum could replace.

This formation — pre-modern, rural, tactile, formed before any theoretical framework had been installed — is the constant in a career that moved from social housing in Madrid’s postwar slums to a theological programme for a Basque mountain sanctuary to a tree-shaped concrete tower to a Cor-Ten steel skyscraper that was deliberately designed, by its own architect’s account, to escape every rhetorical reference and be judged purely as a structural invention. The range is not inconsistency. It is the range of a man who had learned, from stone houses and medieval vaulting and the American architecture he encountered on his 1948 fellowship trip, that the problem of building is never primarily a stylistic one. It is always a problem of what a building needs to be for the people who will use it, in the place where it will stand, with the materials and technology available to the person building it. The style — if there is one — follows from the answer to that problem, not from a prior commitment to a way of working.

This is the last entry in the library, and it is here partly because Oiza is almost unknown in the anglophone world, and partly because including architecture in a library built around texts, sculptures, and oral traditions is itself a statement: that attending to a culture means attending to everything it makes, not only the things that travel well. The buildings are the primary sources. The drawings and theoretical writings that Oiza left behind are the secondary ones that help you read them.

The Navarre-Madrid axis

Oiza graduated from the Madrid School of Architecture in 1946, best in his year, and won his first National Architecture Award the same year for a historicist project for the Plaza del Azoguejo in Segovia — a project executed in a style he was already moving away from, since the Franco regime’s preferred architectural idiom was exactly the historicist monumentalism that the postwar generation was trying to think beyond. The American fellowship that followed in 1947–48 was decisive. He encountered Wright and Le Corbusier not as names in books but as active propositions: buildings you could stand inside and measure your own responses against, built environments that had specific effects on specific bodies in specific light. He returned to Madrid having absorbed both and committed to neither, which is the correct relationship to have with dominant influences.

The social housing work of the 1950s — the Entrevías development, Batán, Puerta Bonita, the Loyola neighbourhood — is where he spent his first professional decade, and it is where the humanist ethics that his son and students most emphasise in accounts of his teaching took practical form. The post-civil war housing crisis in Madrid was acute: the city was filling with migrants from the countryside, living in shanty settlements without water, sanitation, or electricity, and the regime’s official response was a programme of standardised blocks whose primary virtue was cheapness. Oiza worked within the limits of the programme and tried to make something better: buildings that admitted light and air, that organised communal space with some care, that were not condescending to the people who would live in them.

The social housing work is not the subject of this entry, which focuses on the buildings that most directly speak to the theological and philosophical questions this library has been pursuing. But the social housing matters as context: it establishes that the man who built Torres Blancas and the Banco de Bilbao tower was not an architect of luxury and prestige who occasionally engaged with humanist rhetoric. He was an architect who had spent a decade thinking about what buildings do to and for ordinary people, and who brought that thinking to every subsequent commission regardless of scale or budget.

Arantzazu: the architect’s problem

Oiza’s involvement with the Basque cultural tradition was not primarily a question of ethnic identification — he was Navarrese by birth, Sevillano by upbringing, Madrileño by profession, and the question of which of these he was most deeply is probably unanswerable and possibly unimportant. His involvement with Arantzazu was a commission, and then a friendship, and then a lifelong association: the commission to design the new basilica with his partner Luis Laorga in 1950 brought him into contact with Oteiza, Chillida, Basterretxea, and Muñoz, and the collaboration that produced the Arantzazu building was the most concentrated encounter of his career with the question of what sacred architecture should do.

The formal solution Oiza and Laorga found for the basilica is described in the previous entry, on Chillida, and its appearance from the valley approach is described in the entry before that, on Oteiza. What needs to be added here is the architectural argument that the building makes independently of its sculptural programme.

The two towers that flank the main facade are clad in a limestone cut to diamond points — the same thorn motif that gives Arantzazu its name, the thorn bush of the legend made permanent in stone. The material is local: the limestone comes from the mountain above the building, and its rough-cut surface in that specific grey-cream colour belongs to the geology of the place in a way that no imported material could replicate. The interior is long and dark — longer and darker than most modern church interiors, which tend to trade the mystery of darkness for the reassurance of even artificial light — and the darkness is purposeful. The nave is oriented so that the apse catches the morning light from the east through Lucio Muñoz’s altarpiece, and the quality of that morning light falling through the carved wooden panels and onto the stone floor is the primary spatial experience of the interior. You cannot see all of it at once. You move toward the light, which is the movement the building is designed to produce.

The building works in the same register as Oteiza’s apostles on the facade and Chillida’s iron doors at the entrance: it is uncompromising, formally severe, and unwilling to make the experience of the sacred comfortable in the usual sense. Oiza understood this as a theological position, not merely an aesthetic one. He had read enough philosophy of religion and enough liturgical history to know that the conventional Catholic church interior of the mid-twentieth century — with its electric light, its polished marble, its plaster saints in glass cases — had made the experience of worship legible at the cost of making it easy, and that easy and legible were not the same as present or true. What he wanted at Arantzazu, and what the building achieves, is architecture that holds its question open rather than answering it.

Torres Blancas: the tree in the city

The commission for Torres Blancas — 23-storey, 71-metre, mixed-use residential tower on the Avenida de América in Madrid — came in 1961 from Juan Huarte, a Navarrese industrialist whose family construction company had been the most important private patron of avant-garde Spanish architecture and art since the early 1950s. It was Huarte who had enabled Arantzazu; it was Huarte who would later commission the Banco de Bilbao tower; and it was Huarte who gave Oiza something that most architects in post-Franco Spain did not have: a client willing to let the project develop according to the formal problem it posed, rather than according to the budgetary and regulatory minimum.

The problem Torres Blancas posed was stated by Oiza from the beginning as a problem of organic form in the city. The reigning model for high-rise residential construction in the early 1960s was the curtain-wall glass box: regular, efficient, indifferent to place, climate, and the human need for something more than functional square footage. Oiza found this aesthetically and socially wrong, in equal measure. He wanted a tower that grew from the earth rather than being imposed on it, that expanded toward the light as trees expand toward the light, that provided each dwelling with outdoor space in the form of a garden terrace rather than a balcony — the distinction being that a terrace can support plants and create the conditions for a life that is partly outside, partly inside, partly neither.

He began with Wright’s organic tower precedents — the Price Tower in Oklahoma (1956) and the unbuilt St. Mark’s Tower (1927–31), both of which used a central concrete spine with residential units cantilevering outward like branches — and pushed the biological metaphor further and harder than Wright had taken it. Where Wright’s towers are cruciform in plan, Oiza’s is cylindrical at its core, with secondary cylinders clustered around the main mass: the communications cores, service shafts, and stairwells visible from the outside as smaller cylindrical masses nestled against the primary trunk. The balconies that crown the upper levels spread outward in irregular rings, each projecting at a different radius, so that the building widens as it rises — the inverse of the taper that most towers adopt — and arrives at its summit in a cluster of twelve circular discs, ten metres in diameter, that housed the original rooftop pool and restaurant.

The structure is all reinforced concrete and makes no attempt to conceal the fact: the surface is raw and board-marked, the form generated by the structural logic rather than applied to it. The 46 load-bearing columns and folded concrete screens that carry the building’s weight are the same elements that produce its visual character. In this sense Torres Blancas is the antithesis of the curtain-wall tower, in which the structural frame is hidden behind a cladding of glass and metal: here the structure is the architecture, and the architecture is the structure, inseparably.

The young architects who worked with Oiza on the project included Rafael Moneo and Juan Daniel Fullaondo — both of whom became significant figures in subsequent Spanish architecture, Moneo later winning the Pritzker Prize. The relationship between Oiza and the generation he trained is one of the most productive in Spanish architectural culture of the period: he taught at the Madrid School of Architecture from 1949 until his retirement in 1985, and the studio he ran was less a conventional office than a continuous seminar, with the projects as the text.

His son Javier described Torres Blancas as a communion of Wright’s prairie houses, Jørn Utzon’s Kingo Houses, and the structural power of Le Corbusier. The description captures something real about how Oiza worked: not by synthesising influences into a consistent style, but by posing a specific problem — how to make a residential tower that is truly a building for living, with light and air and outdoor space and structural honesty — and finding, through sustained engagement with the materials and with the thought of architects he respected, the form that answered it most completely.

Banco de Bilbao: against rhetoric

Ten years after Torres Blancas, Oiza won the competition for the new Madrid headquarters of the Banco de Bilbao on the Paseo de la Castellana — a commission whose brief was also, in his reading of it, a philosophical problem. The bank wanted a prestige headquarters, a building that would express its modernity and ambition in the idiom of the international corporate tower. Oiza gave it something different: a tower that was deliberately, programmatically stripped of every gesture toward prestige.

His competition entry stated this position directly. He wanted to escape from any rhetorical reference, any facadisme. The building was not to be beautiful or horrible. It was to be judged as a structural invention, and through that structural invention as a series of thirty stimulating atmospheres — thirty floors, each one a fully realised spatial experience rather than a repetition of the floor below.

The structural problem was, in objective terms, extreme. The site on the Castellana was crossed underground by the railway tunnels that run along Madrid’s main boulevard, which meant that the conventional method of distributing a building’s load through multiple columns into the ground beneath it was not available: the load had to be carried over the tunnels and brought down to the earth at the two points where the tunnels did not pass. Oiza resolved this by treating the entire building as a bridge: two massive concrete cores on either side of the tunnels, each containing the lift shafts, service conduits, and stairwells, support seven post-tensioned concrete slabs that cantilever outward from the cores. Every floor is suspended from these slabs, not supported from below. The building hangs.

This structural solution — which made the Banco de Bilbao tower one of the most technically complex reinforced-concrete structures in Europe at the time of its construction — is made explicitly legible from the outside. The Cor-Ten steel facade, which Oiza specified with the knowledge that it would oxidise over time to a deep ochre-rust colour that no applied finish could replicate, is independent of the structure: a curtain of darkening steel that hangs from the structural frame and announces its own material honesty. The ground floor is deliberately emptied — the facade does not reach the earth, leaving a recessed entry zone through which you pass beneath the hanging steel as if entering a cave. The effect, intended and achieved, is of a building that has grown from two deep roots and spread above them, its weight distributed by a logic that is visible to anyone who looks.

The module that governed every dimension of the building — from the spacing of the facade panels to the rise of each stair step to the width of a lighting fixture — was 132 centimetres, and the proportion of the plan derived from this module produces a ratio of approximately 1.60, very close to the golden section. Oiza was explicit that this was not mystical numerology but practical intelligence: a single controlling dimension, consistently applied, produces spatial coherence without requiring constant design decisions at the level of detail. The building thinks for itself, within the framework the architect has established.

The Banco de Bilbao tower was declared a Bien de Interés Cultural — a protected cultural asset — in 2000, the year of Oiza’s death, after rumours of demolition had circulated. It stands now at Castellana 81, its Cor-Ten facade deepening with every decade, its structural logic as legible as ever. It has been refurbished with a LEED Platinum certification, which means that the most technologically sophisticated sustainability standards of the twenty-first century have found nothing to improve in the ventilation and orientation strategy of a building designed in 1971.

The primary sources: drawings and writings

The buildings are the primary sources. But the access problem — that you must travel to see them — makes the drawings and theoretical writings the necessary secondary sources for most readers of this library, and they are substantial enough to reward serious attention.

Oiza’s own writings are collected in Escritos y conversaciones (Fundación Arquia, Barcelona, 2006), a bilingual Spanish-English volume that gathers his competition statements, lectures, essays, and interview transcripts across five decades. It is the essential text for understanding what he thought he was doing, and it is characterised by the same quality that marks his buildings: a willingness to state the problem plainly, to reject the comfortable formulation, and to follow the argument wherever it leads even when it leads somewhere uncomfortable.

He said in one lecture that architecture is not an art. It is a service. A doctor does not study medicine to treat other doctors; an architect should not build buildings for other architects. The worst thing that can happen to architecture is to become an enclosed, self-referential field. This statement is not false modesty: it is the same position that drove the social housing work in Entrevías and the structural honesty of the Castellana tower, the consistent refusal to treat form as a value in itself rather than as the consequence of answering a specific human need in a specific place.

He also said, and this cuts the other way: the most important thing is that architecture is able to represent, excite, evoke. These two positions — architecture as service, architecture as evocation — are not contradictory. They define the space in which every serious building is made: between the obligation to the person who will inhabit or use the space, and the obligation to produce something that exceeds mere usefulness, that gives the person in the building more than they knew they needed.

The drawings are collected in several monographs, most usefully in the El Croquis retrospective volume 32–33 (1989, covering work from 1946 to 1988), which contains plans, sections, elevations, and competition sketches for the major works and is the most complete visual survey of his career available. The ICO Foundation’s 2020 retrospective catalogue, Sáenz de Oíza: Artes y Oficios (ISBN 9788417405236), is more recent and includes personal objects and artistic relationships alongside the architectural documentation; it is available in Spanish and provides the richest contextual account of how the architectural work relates to the broader cultural circles — Oteiza, Chillida, Palazuelo, Sistiaga — in which Oiza moved.

The generation he formed

No account of Oiza’s place in this library is complete without the generation of architects he trained, because the transmission of a sensibility through teaching is itself a form of primary source — a living archive that modifies what the buildings mean in retrospect.

Rafael Moneo is the most internationally celebrated of his students, the 1996 Pritzker Prize laureate whose buildings include the extension of the Prado Museum in Madrid, the Cathedral of Our Lady of the Angels in Los Angeles, and the Kursaal Congress Centre and Auditorium in San Sebastián — the last of which, two great glass boulders on the Zurriola beach, is an act of profound engagement with the Basque coast that echoes Chillida’s dialogue with the same landscape two kilometres away. Moneo has written extensively about Oiza’s teaching, describing a method that was simultaneously rigorous and open: the discipline of the structural problem was never relaxed, but within it every formal solution was possible as long as you could justify it in terms of what the building needed to be.

Juan Daniel Fullaondo, who collaborated on Torres Blancas and later founded the journal Nueva Forma — the most important vehicle for architectural culture in Franco-era Spain — extended Oiza’s engagement with Oteiza’s theoretical work into architectural criticism, producing a body of writing that connects the visual art of the Basque modernist generation with the architecture that was trying to answer similar questions in a different material.

The Public University of Navarre in Pamplona, which Oiza built between 1993 and 2000, is the last major work and in some ways the most complete statement of his position. It is not as formally dramatic as Torres Blancas or as structurally extreme as the Banco de Bilbao tower. It is a campus, which means it is a collection of buildings that have to live together across time and across multiple uses, and the intelligence of its design is in the relationships between the parts rather than the character of any single element. The low brick buildings that house the faculties are set around a series of public spaces that work with the Navarrese plateau’s light and wind in ways that no building specification can capture in advance: you have to be there, in the specific combination of sun and cold and openness, to understand what Oiza understood about this landscape. He was born forty kilometres south of it. He spent his career elsewhere. He returned to it at the end.

How to visit

The three buildings most essential to this library’s concerns are all in Madrid, with the exception of Arantzazu, which has been the site of two previous entries and needs no further description here.

Torres Blancas stands on the Avenida de América, corner of Calle de Francisco Silvela, in the Prosperidad neighbourhood. The nearest Metro stations are Avenida de América (lines 4, 6, 7, 9) and Parque de las Avenidas (line 9). The building is residential and private; you cannot enter the interior without an invitation. The exterior is fully visible from the pavement: stand on the south side of the Avenida and look north, from a distance of fifty to eighty metres, to see the full vertical profile and the way the building widens as it rises. Then approach to the base and look upward through the cylindrical masses. The experience at close range is of a concrete forest; the experience at mid-distance is of an organism growing.

The Banco de Bilbao tower (Castellana 81) is on the Paseo de la Castellana at the corner with Calle Juan Bravo, in the AZCA complex. The nearest Metro stations are Nuevos Ministerios (lines 6, 8, 10) and Santiago Bernabéu (line 10). The ground-floor entrance zone — the recessed space beneath the hanging facade — is publicly accessible during office hours; this is the best single point from which to understand the structural logic. Stand at the entry and look upward at the underside of the facade: the steel hangs above you, its Cor-Ten surface deep ochre against the sky, and you are in the same spatial position as a visitor passing beneath a bridge. Which is exactly what you are. The building’s interior, since the refurbishment, includes a ground-floor lobby that can be entered by members of the public during working hours.

The Oteiza Museum in Alzuza, eleven kilometres from Pamplona, was designed by Oiza and inaugurated the month after the sculptor’s death in 2003. It is the appropriate last stop in any itinerary that has followed this library through its final three entries. The building — low, long, constructed in the same rough stone as the Navarrese landscape — does not announce itself. It accumulates. The entrance is oblique; the galleries unfold gradually; the relationship between the enclosed spaces and the outdoor sculpture court is managed with the precision that characterises all of Oiza’s best spatial thinking. He and Oteiza had been friends and collaborators since 1950. The building he made for Oteiza’s work is, among many other things, an act of sustained attention: a place designed to make a specific body of sculpture as fully present as a building can make anything.

Availability

Buildings: Torres Blancas and the Banco de Bilbao tower are both publicly accessible in the manner described above. Arantzazu is described in Entries 07 and 08; the Oteiza Museum in Entry 07. The Public University of Navarre campus in Pamplona (Calle de Arrosadia) is an open campus accessible during university hours.

Primary texts: Escritos y conversaciones (Fundación Arquia, Barcelona, 2006) collects Oiza’s writings and interviews in a bilingual Spanish-English volume. Available through Spanish booksellers and the Arquia Foundation (fundacion.arquia.com).

Monographs: The El Croquis 32–33 retrospective volume (1989) is available secondhand at reasonable cost and is the most complete visual survey of the career. The ICO Foundation catalogue Sáenz de Oíza: Artes y Oficios (2020, ISBN 9788417405236) is available from the ICO Foundation (fundacionico.es). Miguel Ángel Baldellou’s monograph Sáenz de Oíza: Arquitecto (Diseño Editorial, Buenos Aires, 2019) is the most comprehensive scholarly account available in any language.

English-language resources: There is no substantial English-language monograph on Oiza. The most accessible entry point is Moneo’s Pritzker Prize acceptance speech (1996), available free at the Pritzker Prize website (pritzkerprize.com), which includes a substantial section on Oiza’s teaching and its influence. The architect’s name is spelled variously as Sáenz de Oiza, Sáenz de Oíza, and Saenz de Oiza in different sources; all refer to the same person.

This completes Stream Three: The Basque Library.

Nine primary sources. Nine long readings.

Barandiaran’s fieldwork · Atxaga’s fiction · the interconfessional Bible · the improvisers · Unamuno’s anguish · the witch trials · Oteiza’s void · Chillida’s iron · Oiza’s buildings.

The same question has been asked from nine different positions: what does it mean to attend fully to a specific place, in a specific language, over a very long time? The answers do not converge. That is the point.