The Eurotheum is a 110-metre-tall building located in the heart of Frankfurt am Main, Germany. Constructed parallel to the Main Tower, it has 31 floors and is one of the few skyscrapers in Frankfurt that contains both offices and a hotel. Following the departure of the European Central Bank as one of its main tenants, the building was redesigned by architecture firm Peter Kulka. The foyer ceiling varies widely in height and now features a range of curved walls made of industrial glass profiles up to seven stories tall. Spectral designed and installed a unique light installation for the building. The satinised glass is backlit using over 1,100 linear profiles with mid-power LEDs and specially-developed secondary optics which can be controlled wirelessly using low-energy Bluetooth modules. The five channels cover the basic RGB colours as well as two white channels (3000 and 6500 Kelvin), allowing for impressive displays. Complex scenes can be easily created using a tablet and stored in the cloud.