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This article was originally published on November 5, 2014. To read the stories behind other celebrated architecture projects, visit our AD Classics section.

In a city of skyscrapers of nearly every shape and size, the Citigroup Center on Lexington Avenue is one of New York’s most unique. Resting on four stilts perfectly centered on each side, it cantilevers seventy-two feet over the sidewalk and features a trademark 45-degree sloping crown at its summit. The original structure responsible for these striking features also contained a grave oversight that nearly resulted in structural catastrophe, giving the tower the moniker of “the greatest disaster never told” when the story finally was told in 1995. The incredible tale—now legendary among structural engineers—adds a fascinating back-story to one of the most iconic fixtures of the Manhattan skyline.

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This article was originally published on September 10, 2014. To read the stories behind other celebrated architecture projects, visit our AD Classics section.

Minuscule clusters of visitors ascend a monumental stairway at the base of a spherical monument rising higher than the Great Pyramid of Giza. An arc of waning sunlight catches a small portion of the sphere, leaving the excavated entry portal and much of the mass in deep shadow. Bringing together the emotional affects of romanticism, the severe rationality of neoclassicism and grandeur of antiquity, Etienne-Louis Boullée’s sublime vision for a cenotaph honoring Sir Isaac Newton is both emblematic of the particular historical precipice and an artistic feat that foreshadowed the modern conception of architectural design. Rendered through a series of ink and wash drawings, the memorial was one of numerous provocative designs he created at the end of the eighteenth century and included in his treatise, Architecture, essai sur l’art. The cenotaph is a poetic homage to scientist Sir Isaac Newton who 150 years after his death had become a revered symbol of Enlightenment ideals.

Beyond representing his individual creative genius, Boullée’s approach to design signaled the schism of architecture as a pure art from the science of building. He rejected the Vitruvian notion of architecture as the art of building, writing “In order to execute, it is first necessary to conceive… It is this product of the mind, this process of creation, that constitutes architecture…” (1).  The purpose of design is to envision, to inspire, to make manifest a conceptual idea though spatial forms. Boullee’s search was for an immutable and totalizing architecture. 

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