
|  The flour mill at Barbegal was built in the fourth century AD, along… |  A gearing mechanism was required to convert the horizontal rotation… |
 This aqueduct provided water to the Roman mills at Barbegal and to… |  Remains of the Roman aqueduct that delivered water to Barbegal and… |  The arrow marks the spot where water entered the industrial complex… |
 The twin cuts for the Arles aqueduct: the one on the left served the… |  This channel delivered water to the top of the mill complex at… |  The few remaining walls at Barbegal as seen from above. Photographed… |