The whole appears to be related to the establishment of the Catasto, the first income tax in Florence, in the time the painting was being executed.
David Herlihy and Christiane Klapisch-Zuber's work on these records, Tuscans and Their Families is one of the first historical works to make use of computer-assisted statistical analysis.
Catasto |
His study of the Florentine and Pistoiese Catasto of 1427 is one of the first statistical surveys to use computers to analyse large amounts of data.