<Li> 272 BC Aqua Anio Vetus </Li> <Li> 144 BC Aqua Marcia, 90 km (56 miles) in length, construction starts . </Li> <Li> 33 BC Aqua Julia is built by Octavian (Emperor Augustus) </Li> <Li> 19 BC Aqua Virgo is built to supply the thermal baths in the Campus Martius . </Li>

Where did the romans get their water from