Dom Placido Puccinelli OSB (1609 – 1685) was a Cassinese monk, historian and scholar.
Placido Puccinelli was born at Pescia and educated at the abbey of S. Maria in Florence.
[1] He frequented the then-young Ambrosian Library in Milan, founded by Cardinal Federico Borromeo.
Puccinelli was interested in historical studies, but above all genealogy and prosopography, in which the abbey had a tradition.
He modelled his style after that of the historian of Lucca, Francesco Maria Fiorentini [it], whom he befriended.