[343] Thus in the church of San Lorenzo without the walls there are several pointed windows, now bricked up; and similar ones may be seen in the church of Ara Cœli on the summit of the Capitol. So in the apse of St. John Lateran there are three or four windows of Gothic form: and in its cloister, as well as in that of St. Paul without the walls, a great deal of beautiful Lombard work. The elegant porch of the church of Sant' Antonio Abate is Lombard. In the apse of the church of San Giovanni e Paolo on the Cœlian hill there is an external arcade exactly like those of the Duomo at Pisa. Nor are these the only instances. The ruined chapel attached to the fortress of the Caetani family--the family to which Boniface the Eighth belonged, and whose head is now the first of the Roman nobility--is a pretty little building, more like northern Gothic than anything within the walls of Rome. It stands upon the Appian Way, opposite the tomb of Cæcilia Metella, which the Caetani used as a stronghold. [344] A good deal of the mischief done by Robert Guiscard, from which the parts of the city lying beyond the Coliseum towards the river and St. John Lateran never recovered, is attributed to the Saracenic troops in his service. Saracen pirates are said to have once before sacked Rome. Genseric was not a heathen, but he was a furious Arian, which, as far as respect to the churches of the orthodox went, was nearly the same thing. He is supposed to have carried off the seven-branched candlestick and other vessels of the Temple, which Titus had brought from Jerusalem to Rome. [345] We are told that one cause of the ferocity of the German part of the army of Charles was their anger at the ruinous condition of the imperial palace. [346] Under the influence, partly of this anti-pagan spirit, partly of his own restless vanity, partly of a passion to be doing something, Pope Sixtus the Fifth did a great deal of mischief in the way of destroying or spoiling the monuments of antiquity. [347] These campaniles are generally supposed to date from the ninth and tenth centuries. I am informed, however, by Mr. J. H. Parker, of Oxford, whose antiquarian skill is well known, that he is led to believe by an examination of their mouldings that few or none, unless it be that of San Prassede, are older than the twelfth century. This of course applies only to the existing buildings. The type of tower may be, and indeed no doubt is, older. Somewhat similar towers may be observed in many parts of the Italian Alps, especially in the wonderful mountain land north of Venice, where such towers are of all dates from the eleventh or twelfth down to the nineteenth century, the ancient type having in these remote valleys been adhered to because the builder had no other models before him. In the valley of Cimolais I have seen such a campanile in course of erection, precisely similar to others in the neighbouring villages some eight centuries old.