Aqueducts built. • 11 aqueducts in total o Aqua Marcia & Tapulialulia built in 1st – 2nd cnt BC o Annio Novus & Cloudius (1st cnt AD)  Built by cloudius  Met together at esquilne hill o Alsietina  Did not transport potable water mainly for bathhouses (4h 47min, aug 25, 500 y BC