Career
Joining the Franciscans at an early age, he devoted himself to Oriental languages and became an authority on Hebrew. Once entering Rome he was appointed by Paul V, whose confessor he was to the chair of Scripture at Ara Coeli. Calasio is known by his Concordantiae sacrorum Bibliorum hebraicorum, published in 4 volumes
(Rome, 1622), two years after his death, a work which is based on Nathan"s Hebrew Concordance (Venice, 1523).