4to, pp. (12), 122, (2), modern half parchment binding and corners with gilt title on spine label. Printing company on the title page and another large company on the colophon. Woodcut illustrations in the text and full page relating to the ancient topography of Rome.
Pages 11-14 are missing, corresponding to leaves B2 and B3. Scattered halos, title page and last page lined on verso, various trimmings on figures
Rare Roman impression of September 1544