Bartolomeo Crescenzio suddenly appears in the records when he publishes in 1595 his first text, “Proteo Militare” written in c1587. He is an Engineer of the “Papal Fleet” and obviously an educated person. The next work is a “Portolan Chart” dated 1596 on which he declares it corrects previous chart errors. He then writes a second text, “Nautica Mediterranea”, published in Rome 1602, which includes the simple chart inserted previous to a Portolano text of 63 pages.
The whole oeuvre of Bartolomeo Crescenzio is analysed, discussed, and a rationale for their existence perhaps uncovered. There is then an appendix which mentions a 2021 text making unattested claims for the 1596 chart and another of 1525.
The text is 15 pages and contains 24, diagrams, (A3)