neighbours, whose riches, at present, they imagine, insult their own poverty. This town being exposed, by the nature of its commerce with Turkey, to the contagious diseases which prevail in that country, Clement XII., as soon as he determined to make it a free port, erected a lazzaretto. It advances a little way into the sea, is in the form of a pentagon, and is a very noble, as well as useful, edifice. He afterwards began a work, as necessary, and still more expensive; I mean the Mole built in the sea, to screen the vessels in the harbour from the winds, which frequently blow from the opposite shore of the Adriatic with great violence. This was carried on with redoubled spirit by Benedict XIV. after his quarrel with Venice, has been continued by the succeeding Popes, and is now almost finished. This building was founded in the ruins of the ancient Mole, raised by the Emperor Trajan. The stone of Istria was used at first, till the exportation of it was prohibited by the republic of Venice, who had no reason to wish well to this work. But a quarry of excellent stone was afterwards found near Ancona, as fit for the purpose; and a kind of sand, which, when mixed with lime, forms a composition as hard as any stone, is brought from the neighbourhood of Rome; and no other is used for this building, which is above two thousand feet in length, one hundred in breadth, and about sixty in depth, from the surface of the sea. A stupendous work, more analogous to the power and revenues of ancient, than of modern, Rome. Near to this stands the Triumphal Arch, as it is called, of Trajan. This is an honorary monument, erected in gratitude to that Emperor, for the improvements he made in this harbour at his own expence. Next to the Maison Quarrée at Nîmes, it is the most beautiful and the most entire monument of Roman taste and magnificence I have yet seen. The fluted Corinthian pillars on the two sides are of the finest proportions; and the Parian marble of which they are composed, instead of having acquired a black colour, like the Ducal palace of Venice, and other buildings of marble, is preserved, by the sea vapour, as white and shining as if it were fresh polished from the rock. I viewed this charming piece of antiquity with sentiments of pleasure and admiration, which sprang from a recollection of the elegant taste of the artist who planned this work, the humane amiable virtues of the great man to whose honour it was raised, and the grandeur and policy of the people who, by such rewards, prompted their Princes to wise and beneficent undertakings. LETTER XXXI. Loretto.