was connected to two different aqueducts, in case one was shut down for service.

The Romans were able to make fountains jet water into the air, by using the pressure of water flowing from a distant and higher source of water to create hydraulic head, or force. Illustrations of fountains in gardens spouting water are found on wall paintings in Rome from the 1st century BC, and in the villas of Pompeii. The Villa of Hadrian in Tivoli featured a large swimming