Romans were great builders of civil engineering works and the aqueducts were some of their most impressive creations. The Claudius aqueduct is certainly the most famous one. Its construction was started by Caligula in 38 A.D. and ended by Claudius in 52 A.D. It stretched for nearly 69 km out of which only 16 are not underground. Still today it is possible to admire a big part of it in the Parco degli Acquedotti. This monumental work, which had supplied water to several areas of Rome, has been reproduced by dozens of artists, drawers, photographers and painters. In his journey to Rome, Goethe described this aqueduct as "a series of triumphal arches".