About the architects

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Pei Cobb Freed & Partners is one of the most prestigious and renowned architecture firm in the world. It is based in New York. Since it was founded in 1955, it has carried out over 250 projects of great importance in more than 100 cities all over the world, both for public bodies as well as private developers and educational, cultural and religious institutions.

The most iconic works of this firm include the John Hancock Tower in Boston, the Bank of China Tower in Hong Kong or the expansion and modernisation of the Louvre Museum in Paris.

Pei Cobb Freed & Partners has received prestigious awards: The Chicago Architecture Award or the Lifetime Achievement Award from the New York Society of Architects.

Sustainability, both technically and socially, is key to these two ideas, with a portfolio of projects that feature consideration to climate, energy and water efficiency, natural light and environmental quality. These considerations allow the firm to reach a level of excellence in the most demanding international ratings, such as BREEAM in Europe, or LEED in America.


“The key to an unprecedented profile
and a unique personality”

When designing this slender skyscraper, Pei Cobb Freed & Partners were inspired by their client’s express desire of constructing not only an office building, but rather one that had an emblematic and dynamic presence at street level and on the the Madrid skyline. In the face of this challenge, the firm explored and exploited the potential of non-octagonal geometry, used in both horizontal and longitudinal sections, to create a different and attractive structure.

Torrespacio evolves from a square plan on the ground floor to two curved sections, made from the intersection of two quarter circles at the peak. The geometric mechanism that makes the construction of this evolution possible is the cosine curve, which streamlines the intersection points between the two curved surfaces and allows the creation and mounting of the curtain wall.

An important peculiarity of the cosine curve is that its curvature ratio is not constant. Instead, it decreases gradually as it moves up from the base to the top. This gives the building a characteristic sense of propulsion, as if it were a living organism that has protruded from the ground on which it stands.

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