The aqueduct carrying the Acqua Vergine Nuovo was completed in the 1820s, and its water provided the opportunity for fountains and their basins that offered the usual public water supply for the rioneor urban district. Ever since the Renaissance such terminal fountains also provided an occasion for the grand terminal water show called in Rome a mostra or a show. "What makes a fountain a mostra is not essentially its size or splendor, but its specific designation as the fountain that is a public memorial to the whole achievement of the aqueduct."[5] Valadier had planned fountains in the upper tier of the Pincio slope, but these were not carried out, in part for lack of water.[6]