an Irish Catholic theologian. Hackett was born at Fethard, co. Tipperary, Ireland, and was educated in the Dominican convent at Cashel, where he became a member of that order. As a professor, he subsequently taught with reputation at Milan, Naples, and Rome. He received the degree of master in theology from the general chapter of the Dominican order in 1644. His character and erudition, gained him the confidence of eminent dignitaries in Italy, and Cardinal Altieri, subsequently Pope Clement X, is said to have urged his promotion to the cardinalate.
