The Konrad Adenauer Foundation organized, in collaboration with the ZGRADOnačelnik.hr portal, the Representation of the European Commission in Croatia, the Association of Cities in Croatia, and numerous professional partners, the presentation of the handbook: (O)SUNNY ROOFS OF CROATIAN CITIES, on January 31st, 2024, in Zagreb. It is a unique manual for municipal employees. Considering that the installation of a solar power plant on a building's roof owned by the city is an "interdisciplinary" endeavor involving multiple city departments, the handbook is written in a simple, informative, educational manner, with numerous examples. The goal of presenting this handbook is to send a clear message to the professional and broader public - cities are becoming leaders in the energy revolution in Croatia.