Matal collates in the houses of Antonio Massa and Basilio Zanchi manuscripts of the "Corpus Agrimensorum Romanorum" [Thulin 1911: 35f.], [Ferrary 1992: 35f.], [Toneatto II 1994: 679–693]

Letter by Alessandro Manzuoli to Pier Luigi Farnese, in which he recommends Jacopo Barozzi da Vignola to Pier Luigi Farnese, because Vignola would waste his talent in Bologna: "un bell'ingegno tale si perde a non esercitarsi di continuo" [Ronchini 1865: 362]

Bernardino Maffei writes a letter to Marcello Cervini, then in Trento, about the just found Fasti Capitolini.

Letter by Juan de Arce with inscriptions from Florence to Agustín in Rome [Flores Sellés 1980: 209 Nr. 147]

Sebastian Gryphius writes a letter to Pietro Vettori 

Morillon meets Mendoza in Trento and makes a deep impression on him.