The exhibition "Mondo piccolo", curated by Denis Curti, is opening March 3, 6:00 p.m. at Centro Culturale di Milano. Fifty years after the death of Giovannino Guareschi, on display 40 photographs that document the research on the places, people and memory of that small portion of the Po Valley that inspired the books of the writer who spent a long and prolific period of his literary and publicist production in Milan .