Invisible cities. Chapter 2. Cities and Memory 5. Maurilia : The Explosives factory. In Maurilia, the traveler is invited to visit the city and at the same time to observe certain old illustrated postcards that represent it as it was before: the same exact square with a chicken in place of the bus station, the music kiosk in place of the overpass, two young women with white parasols in place of the explosives factory.