​Waiting for his execution at Castel Sant'Angelo, the painter Mario Cavaradossi writes a farewell letter to his beloved Tosca in the eponymous opera "Tosca" (1900) by Giacomo Puccini entitled "E Lucevan le Stelle" ("And the stars are shining"). In a sound installation at the medieval Klempenow Castle in Western Pomerania, Germany, a loudspeaker system pushes the "Tosca" aria in version of a live recording from 1957 through the openings in the walls into the summer sky above Klempenow. The music accompanies everyone who steps out onto the balcony and lets their gaze wander over the canoe hiking station, the fields and an army of huge wind turbines in the distance, only a few of which are turning, at a height of around 20 metres.