Server farms are to the digital world what castles used to be: the seat of power. If data is the greatest collective treasure of a digital society, basic material for business and politics: Why are the places where it is stored still so invisible? Together with students from the Städelschule in Frankfurt am Main, Niklas Maak shows what the future of the most important new building typology of the twenty-first century might look like—and what new collective places a city needs in the age of digitalization.