Bold claim: a giant white sphere crowned the skyline of Leipzig’s industrial heart, turning a utilitarian block into a dazzling, almost otherworldly landmark. And this is not a sci‑fi prop—it's the Niemeyer Sphere, a 12‑metre-diameter architectural marvel designed by Oscar Niemeyer, tucked into a former boiler house corner amid brick factories and equipment yards in eastern Germany.
The Sphere looks like a future artifact dropped into a working‑class street where car lots and rental yards mingle with the city’s daily grind. Its audacious form—pure white, perfectly round—evokes everything from a colossal golf ball to a mysterious spacecraft, prompting visitors to ask: what is this thing doing here, and why now?
Opened to the public in June 2020, the Sphere’s journey from idea to inauguration spanned twenty years, a tale captured by photographer Margret Hoppe as she chronicled each elaborate phase. The current show, Spirit of Past Future, pairs her images with works by Armenian artist Nvard Yerkanian, offering a guided tour through modernist architecture and Niemeyer’s ambitions.
This exhibit narrates how Niemeyer, often wary of rigid rules, sought architecture that felt alive, stepping beyond strict Bauhaus or Le Corbusier traditions. The Sphere sits atop a building block in Niemeyer’s career arc—the culmination of a philosophy that blends form, light, and surprise.
The project’s origin traces back to 1994, when East German state enterprises were being privatized. A West German entrepreneur, Ludwig Koehne, acquired a heavy machinery factory for one Deutsche Mark and rebranded it Techne Sphere. He envisioned a rooftop restaurant that would reuse existing kitchen facilities for cooking and cleaning, a space where events could thrive alongside the original canteen.
A pivotal moment came in 2007, when Koehne visited Brazil and fell in love with Niemeyer’s Brasília—its dawn palace and the crown‑shaped Cathedral of Brasília—visions that would later shape the Sphere. In 2011 he reached out to Niemeyer and met the architect in person after returning from Brazil. He then persuaded Tibor Herzigkeit, the canteen’s chef and owner, to commit to at least a decade more of involvement, a pledge Herzigkeit accepted.
Niemeyer sketched the project when he was 103 years old—a round form with windows at top and bottom. He passed away in 2012, leaving behind materials but no finished blueprint. Koehne recalls this as an extraordinary honor and a responsibility to honor Niemeyer’s spirit.
To realize the concept, Koehne joined forces with executive architect Harald Kern and Niemeyer’s longtime associate Jair Valera. After extensive planning, testing, and selecting the right partners, construction began with the foundation stone laid in 2017. Each phase presented its own challenge, but the south‑west windows proved especially tricky: Koehne wanted a space that was not only beautiful but also comfortable—proper light, atmosphere, and temperature. The team pursued an “invisible shading” approach compatible with Niemeyer’s curves.
A breakthrough came with Merck’s development of liquid crystal glass, providing dynamic shading. By 2019, Merck crafted 144 unique triangular panes that could dim from a neutral gray to nearly black, controlled by a digital system. This technology lets the interior gracefully adapt to daylight and glare, preserving the building’s sculptural silhouette.
Niemeyer’s own philosophy shines through in his 1988 Pritzker Prize acceptance speech, where he spoke of beauty, fantasy, and surprise as vital to architecture that embraces technology, light, and fluidity rather than rigid machine‑like function.
The Sphere continues Niemeyer’s legacy of curved forms and natural inspiration. Inside, the exterior white concrete and dark glass by day give way to illuminated windows at night, with the glass offering subtle, adjustable transparency that reduces glare. Koehne describes the effect as “walk‑in sunglasses” for the façade—an invitation to notice how the sky, clouds, and light transform the space as evening settles.
Niemeyer already explored adaptive technology long before the Sphere, such as the Obra do Berço nursery in Rio de Janeiro, which used movable panels to catch winter sun or block summer heat. Valera and Kern believe Niemeyer would have appreciated liquid crystal glass for its elegant, unobtrusive control over light and temperature.
Beyond the Sphere, the factory complex houses two additional art galleries and hosts occasional outdoor concerts. The Sphere’s opening ceremony featured a Bach cello suite, underscoring the project’s fusion of art, architecture, and music.
The Sphere is a three‑level space with a technical lower level, a visitor middle level that hosts a kombucha and gin bar, and a top floor where guests can lounge on designer seating while taking in views of the surrounding rooftops. A curved window descends through the floor, its triangular panes dimmed by a digital system, mirroring the precision used in modern aviation blinds.
On the top level, an interior wall bears Niemeyer’s drawing—red lines on a pale field—an echo of the decorative flourishes he added to many works. This project, Niemeyer’s final endeavor, embodies his enduring interests: the elegance of curves, the element of surprise, and a sense of lightness that almost defies gravity.
As Valera observes, Niemeyer sought simplification through elegance and buoyant lightness rather than reduction of elements. The Sphere stands as a bold, contemporary culmination of that vision, inviting visitors to rethink how architecture, art, and technology can combine to create spaces that are not just seen, but experienced.
