A small increase of width in the Corso is now dignified by the name of the _Piazza Sciarra_. The street which turns off hence, under an arch (Via de Muratte, on the left), leads to the _Fountain of Trevi_, erected in 1735 by Niccolo Salvi for Clement XII. The statue of Neptune is by Pietro Bracci. "The fountain of Trevi draws its precious water from a source far beyond the walls, whence it flows hitherward through old subterranean aqueducts, and sparkles forth as pure as the virgin who first led Agrippa to its well-springs by her father's door. In the design of the fountain, some sculptor of Bernini's school has gone absolutely mad, in marble. It is a great palace-front, with niches and many bas-reliefs, out of which looks Agrippa's legendary virgin, and several of the allegoric sisterhood; while at the base appears Neptune with his floundering steeds and tritons blowing their horns about him, and twenty other artificial fantasies, which the calm moonlight soothes into better taste than is native to them. And, after all, it is as magnificent a piece of work as ever human skill contrived. At the foot of the palatial façade, is strown, with careful art and ordered regularity, a broad and broken heap of massive rock, looking as if it may have lain there since the deluge. Over a central precipice falls the water, in a semicircular cascade; and from a hundred crevices, on all sides, snowy jets gush up, and streams spout out of the mouths and nostrils of stone monsters, and fall in glistening drops; while other rivulets, that have run wild, come leaping from one rude step to another, over stones that are mossy, shining and green with sedge, because, in a century of their wild play, nature has adopted the fountain of Trevi, with all its elaborate devices, for her own. Finally the water, tumbling, sparkling, and dashing with joyous haste and never ceasing murmur, pours itself into a great marble basin and reservoir, and fills it with a quivering tide; on which is seen, continually, a snowy semi-circle of momentary foam from the principal cascade, as well as a multitude of snow-points from smaller jets. The basin, occupies the whole breadth of the piazza, whence flights of steps descend to its border. A boat might float, and make mimic voyages, on this artificial lake.