Acciottolato o Ciottolato:

The construction technique involves the use of polished and rounded pebbles or pieces of stone, with variable calibration, placed on the substrate in cement mortar. In the case of a paved driveway, today’s cobblestones are mounted on an armored iron platform. The cobblestones are designed to consolidate roads and squares that were originally made of beaten earth only. It also served to regulate the rainwater that most often made the roads impassable. After the fall of the Roman Empire, in fact, the cities in most cases leave for a long time the management of sewage systems, so in case of heavy rain roads and streets became impassable.