Ingenious Interplay: Dance of Reflection and Structure At the heart of the ETH Hönggerberg campus stands the HIL faculty building for architecture and building sciences, designed by Max Ziegler & Erik Lanter in 1976, adorned with an iconic spiral staircase. This graceful ascent is set against the building’s facade. As the sun sinks lower, the reflection of a building opposite casts a dynamic yet harmonious overlay on the windows below. It’s a testament to the campus’s innovative spirit and architectural legacy, where learning spirals upward in the embrace of design and science.