The authors are a group of art historians who experienced Rome together years ago and thenwent their separate ways: as an on-the-spot guide, as research scholars at the Universityof Munich and at the Zentralinstitut für Kunstgeschichte in Munich and the Bibliotheca Hertziana in Rome, respectively, as professor at the Friedrich Alexander-Universität Erlangen-Nürnberg (and now at the Humboldt-Universität in Berlin).