Redevelopment of the external environment of a historic building through the use of the Nidagravel a gravel stabilizer, 100% draining and eco-sustainable material, resistant to ultraviolet radiation and frost; This type item maintains the drainage characteristics of the soil unaltered and prevents the growth of weeds from the subsoil; Carriageable material and thanks to the particular honeycomb shape allows the use of the space for bicycles, wheelchairs and pedestrians;