Torre Blancas / Francisco Javier Sáenz De Oiza | Classics On Architecture Lab

Architects: Francisco Javier Sáenz de Oiza
Area: Approx. 31,500 m² (Built), Approx. 3,361 m² (Site)
Year: 1969
Photographs: Francisco Javier Sáenz de Oiza, Ana Amado, Manolo Yllera, Håkan Svensson Xauxa
Interior Design: Francisco Javier Sáenz de Oiza
Structural Engineer: Leonardo Fernández Troyano, Carlos Fernández Casado
Landscape: Francisco Javier Sáenz de Oiza
Construction: Huarte Construction Company
Material: Concrete, Glass, Steel
Client: Juan Huarte
Typology: Residential – Apartments, Mixed-use
City: Madrid
Country: Spain

Torres Blancas, designed by Francisco Javier Sáenz de Oiza, is a key 20th-century architectural landmark in Madrid, completed in 1969. Initially planned as a twin-tower complex, only one was built due to municipal restrictions. Structurally, it features a monolithic reinforced concrete core, cylindrical forms, and cantilevered balconies resembling tree branches, while its sculptural facade enhances light and shadow effects. The upper levels include communal amenities and a rooftop pool inspired by Le Corbusier’s terraces. Inside, modular apartments maximize flexibility, natural light, and ventilation, with wooden screens and greenery softening the concrete aesthetic. Initially met with mixed reactions, it later received the European Excellence Award in 1974. Blending organic design with high-rise innovation, Torres Blancas remains a defining feature of Madrid’s skyline.

Torre blancas / francisco javier sáenz de oiza | classics on architecture lab

orres Blancas, conceived by Francisco Javier Sáenz de Oiza and backed by the Huarte company, embodies a departure from traditional high-rise residential architecture. Drawing inspiration from Spanish Organicism, the building stands as a unique vertical garden city within Madrid. This 71-meter tall structure merges the vision of Le Corbusier’s Unité d’Habitation with Frank Lloyd Wright’s organic tower concepts featuring housing units interspersed with garden terraces. While it was initially intended as part of a twin-tower development, only one tower materialized due to municipal limitations. Today, the singular Torres Blancas is celebrated as a prominent fixture in Madrid’s architectural panorama.

The project emerged from the collaboration between developer Juan Huarte and architect Francisco Javier Sáenz de Oiza, with structural input from engineers José Antonio Fernández Casado and Javier Manterola. Sáenz de Oiza, a pivotal figure in Spanish architecture, had been deeply influenced by the Modern Movement, Alvar Aalto’s organic designs, and the later works of Le Corbusier. The goal was to create an ideal tower—not a conventional stack of apartments but a unified residential structure incorporating nature and community-oriented spaces. Juan Huarte, a patron of avant-garde architecture, granted Sáenz de Oiza the freedom to experiment without the typical budget constraints. The design initially proposed two 60-meter-high towers, each featuring a variety of apartment types, communal spaces, a rooftop swimming pool, and ground-floor amenities including a chapel and kindergarten. However, the second tower was never built due to municipal restrictions, and the approved design resulted in a single 23-story tower with 20 residential floors, two communal levels, and a rooftop garden.

Torres Blancas is a structural milestone in Spanish architecture, abandoning the conventional column-and-beam system in favor of a monolithic reinforced concrete structure. The building’s cylindrical forms and curved balconies create a fluid, tree-like composition, with the central load-bearing core functioning as the trunk and the cantilevered platforms as branches. The exterior balconies, seemingly suspended from the main structure, resemble leaves extending outward, reinforcing the organic metaphor. The tower’s sculptural facade results from an interplay of circular platforms, which project outward in varying rhythms, creating a dynamic composition of light and shadow. The structure relies on 46 concrete pillars and folded screens arranged around a vertical core, with slabs that distribute loads evenly in all directions. This departure from traditional skyscraper engineering contributes to the building’s expressive form, where structure and architecture are inseparable. At the uppermost levels, the cylindrical volumes expand to 10 meters in diameter, housing the communal spaces, including a restaurant, lounge, and rooftop pool. This rooftop space—reminiscent of Le Corbusier’s Unité d’Habitation terraces—features a freeform swimming pool interwoven with circular planters, evoking the biomorphic landscapes of Roberto Burle Marx.

The tower’s interior follows a modular system, with residential units arranged around a garden terrace or open courtyard. The primary apartment layout consists of L-shaped units where living areas and bedrooms open onto private terraces, reinforcing the concept of a vertical garden city. Smaller apartments were later incorporated into the design, adapting to market demands. Unlike conventional high-rise apartments, the interiors were conceived as flexible spaces, with a circulation core that minimized corridors and maximized natural light and ventilation. The central core, containing elevators, staircases, and service shafts, maintains a sculptural presence throughout the building, echoing the curvilinear language of the exterior. Circular bathrooms, compact and efficient, reflect Sáenz de Oiza’s technical approach to space optimization. Materiality plays a crucial role in softening the raw concrete surfaces. Wooden filigree screens on the balconies add warmth and texture, while interior finishes include extensive white marble, seamlessly merging with the building’s sculptural elements. Greenery—vines and climbing plants—further integrates the tower with its organic inspiration, visually connecting it to the natural landscape.

Torres Blancas was met with both admiration and controversy upon completion. While architectural critics praised its innovation, some saw it as an impractical model, detached from Madrid’s urban and social transformation. The use of exposed concrete in a luxury residential building was unconventional at the time, challenging prevailing aesthetic norms. Its location, at the northern edge of Avenida de América, positioned it as a striking landmark amidst the city’s expanding periphery. Unlike other Brutalist towers of the era, which often engaged with their urban surroundings, Torres Blancas stands as an autonomous architectural statement, its identity defined by verticality and sculptural expression rather than contextual integration. Despite initial skepticism, the tower has endured as one of Spain’s most celebrated architectural achievements. Awarded the European Excellence Award in 1974, it remains a testament to the ingenuity of Sáenz de Oiza’s vision. Its undulating concrete surfaces, softened by time and vegetation, continue to captivate, reinforcing its place within the lineage of modern organic architecture.

Legacy
Torres Blancas is more than a high-rise; it is an experiment in spatial, structural, and organic design. By merging the concepts of a self-sufficient tower, a garden city, and a biomorphic structure, Sáenz de Oiza created a residential model that challenges conventional typologies. As architecture historian Antón Capitel noted, the project synthesizes three key ideas: the vertical garden city inspired by Le Corbusier, the tree-like structural analogies of Wrightian influence, and Sáenz de Oiza’s own pursuit of organic form. This fusion of influences resulted in an expressive Brutalist structure that is both an embrace and critique of modernity. Over five decades later, Torres Blancas remains an architectural enigma—both deeply rooted in its era and strikingly ahead of its time. Its singular presence in Madrid’s skyline ensures its continued status as an icon of 20th-century architecture.