HE little book of which an Englilh verfion is here publifhed for the firft time was the fiandard guide-book of the more learned vifitors to Rome from the twelfth to the fifteenth century. Its fiatements were received with the refpect due to a work of authority, and their influence may be traced in the writings of many of the authors who flouriihed during that period. The molt {triking example of the long-fufiained credit of the medieval Roman Topo graphy is afforded by the Letters of Petrarch. In the defcriptions of Rome given by this great leader of the Revival of Learning, fcarcely any trace appears of the new critical fpirit, but the locali ties are {till prefented under the names, and affociated with the legends, of the Mira 6 did.