Unfortunately this Rome of the schismatic and Avignonese popes was no longer, in respect of classical remains, what it had been some generations earlier. The destruction of 140 fortified houses of the Roman nobles by the senator Brancaleone in 1257 must have wholly altered the character of the most important buildings then standing; for the nobles had no doubt ensconced themselves in the loftiest and best-preserved of the ruins.[410] Nevertheless, far more was left than we now find, and probably many of the remains had still their marble incrustation, their pillared entrances, and their other ornaments, where we now see nothing but the skeleton of brickwork. In this state of things, the first beginnings of a topographical study of the old city were made. In Poggio’s walks through Rome[411] the study of the remains themselves is for the first time more intimately combined with that of the ancient authors and inscriptions--the latter he sought out from among all the vegetation in which they were imbedded[412]--the writer’s imagination is severely restrained, and the memories of Christian Rome carefully excluded. The only pity is that Poggio’s work was not fuller and was not illustrated with sketches. Far more was left in his time than was found by Raphael eighty years later. He saw the tomb of Cæcilia Metella and the columns in front of one of the temples on the slope of the Capitol first in full preservation, and then afterwards half destroyed, owing to that unfortunate quality which marble possesses of being easily burnt into lime. A vast colonnade near the Minerva fell piecemeal a victim to the same fate. A witness in the year 1443 tells us that this manufacture of lime still went on; ‘which is a shame, for the new buildings are pitiful, and the beauty of Rome is in its ruins.’[413] The inhabitants of that day, in their peasants’ cloaks and boots, looked to foreigners like cowherds; and in fact the cattle were pastured in the city up to the Banchi. The only opportunities for social gatherings were the services at church, on which occasion it was possible to get a sight of the beautiful women. In the last years of Eugenius IV. (d. 1447) Blondus of Forli wrote his ‘Roma Instaurata,’ making use of Frontinus and of the old ‘Libri Regionali,’ as well as, it seems, of Anastasius. His object is not only the description of what existed, but still more the recovery of what was lost. In accordance with the dedication to the Pope, he consoles himself for the general ruin by the thought of the precious relics of the saints in which Rome was so rich.[414]