03 September 201913.07 Detachment of a block of tufa of about 50 centimeters from the walls of the Roman aqueduct at the height of the arches of Piazza di Porta San Giovanni, in the center of Rome. On-site fire brigade and local police. From the very first information, it seems to be a block that fell from the top of the aqueduct. Arranged a barrier of about 30 meters. On-the-spot checks are still in progress.