The exhibition brings together historical photographs of the Arxiu Fotogràfic of the Ajuntament de Barcelona that cover the city's life, from the Universal Exhibition of 1888 to the International Exhibition of 1929, a period of time in which the two main novels of Eduardo Mendoza, "The Truth about the Savolta Case" and " The City of Marvels " are set. The fifty photographs show the construction of the exhibition spaces that transformed the appearance of the city, the life of the bourgeoisie, anarchist protests and other social conflicts of this time.