As they had during the Renaissance, ruins in the eighteenth century continued to serve as places of exchange between antiquity and modern times and between one architect and another. Rome functioned as a cultural entrep?t, drawing to it architects of the caliber of Filippo Juvarra, Robert Adam, Charles-Louis Cl?risseau, and Giovanni Battista Piranesi. Through their collaboration, on-site exchanges, publications, and polemics, architects contributed...