How do darkness and democracy relate? Or education and the cosmos? These are two of the many questions raised, more or less implicitly, by this book, which connects pedagogy, urban planning, lighting design and performance. It concerns the Lysfest, the "Light Festival", which took place in the years 2013-2017, in Roskilde, the ancient Danish capital, today part of the Great Copenhagen, and in particular the work involved carried out by the Performance Design students from Roskilde University (RUC), with the support of their teachers and the city administrators, strongly inspired by the extraordinary work with light of Fabrizio Crisafulli, the Italian artist who played a leading role in the project and created works in its context: a pilot-experience gathering thousands of people in the dark, in front of the luminous works created in the old town, which aroused collaboration between university and the city, and concrete solutions for urban regeneration: a project – writes Joy Mogensen, Mayor of Roskilde during the Lysfest years, and then Danish Minister of Culture – “formed by frontrunners within a fusion of knowledge, cultural vision and democratic debate”.