Mario di Calasio (1550 in Calascio, Abruzzi, Italy – February 1, 1620 in Ara Coeli) was an Italian Minorite friar.

Once entering Rome he was appointed by Paul V, whose confessor he was to the chair of Scripture at Ara Coeli.

[6] For forty years Calasio labored on this work, and he secured the assistance of the greatest scholars of his age.

All root-words are treated in alphabetical order and the whole Bible has been collated for every passage containing the word, so as to explain the original idea, which is illustrated from the cognate usages of the Aramaic, Syriac, Rabbinical Hebrew and Arabic.

Calasio gives under each Hebrew word the literal Latin translation, and notes any existing differences from the Vulgate and Septuagint readings.