The Swiss firm EM2N has recently completed the Keystone Building in Prague. The project’s most distinct feature is the faceted aluminum facad, which the firm says was inspired by Czech Cubism of the early 20th century. But the faceted facade also helps the building reduce emissions.
“The double-layered façade not only produces a sculptural outer skin, but also improves the performance of the windows in terms of thermal and acoustic insulation” says the firm in their project description. The project is a little bit like an inverted geode to me, all the crystalline parts are of display outside the building, and the interior is a less glamorous and rational stack of office spaces. There is, however, a surprise on the interior. The polished, reflective surfaces that surround the stairwell create a space-bending optical effect.