Produced by Juliet Sutherland, Hillie Plantinga and the Online Distributed Proofreading Team at http://www.pgdp.net The following typographical errors have been corrected: Page v, "Romana" changed to "Romano" (by Giulio Romano, Francesco Penni,) Page 59, "Bulletino" changed to "Bullettino" (in footnote [38]: See Henzen, _Bullettino dell' Instituto_, 1863,) Page 91, "Receuil" changed to "Recueil" (in footnote [51]: Leon Renier: _Recueil des diplomes militaires_) Page 120, "Ardentina" changed to "Ardeatina" (S. Petronilla on the Via Ardeatina) Page 131, "Venedetto" changed to "Benedetto" (the master-mason Benedetto Drei…
Or read it translated: 日本語 · 中文 · हिन्दी · Español · العربية · Français · বাংলা · Português · Русский · Bahasa Indonesia · اردو · Deutsch · Kiswahili · 한국어