Repaired Fountain 1744
I think it is discussing the restoration of water to the Trevi Fountain.
Plaque reads:
'Benedictus XIV POM
ivos aqua virginis compluribus locis manantes quique in usu esse desierant in urbem reduxit aqua ductus vetustate collapsos restauravit fistulas tubulos castella lacus purgato fonte restituta forma ingenti liberalitate in ampliorem formam redegit an sal MDCCXLIV Pont IV'
Google translates from Latin as '
Benedict 14 The use of the water of the Virgin to be in many places that it had ceased to flow from that source or the one in the town was restored in the villages, the water of a lake, having purged the pipes on the pipes of the fountain repaired fallen to decay, was restored, led by the form of the salt of the 1744 with a great generosity to his undertaking a more ample form of a province'
Submitted by: @IanThorp