in which he enjoyed free access to all the libraries of Rome, Pietro brought out his work in three volumes (Rome, 1753–57) reproducing the entire edition of Quesnel together with elaborate refutations and additions (Migne, Patrologia Latina, LIV-LVI). The third volume is a profound study of the sources of canon law. The comments contain several attacks on Jansenism and Gallicanism. Quesnel had published a collection of canons from a codex which he believed to have been in use under Pope Innocent I, Pope Zozimus, and Leo the Great. Besides disproving this, Pietro brought out in an improved form earlier Latin editions of the canons, together with some very old unknown versions of Greek canons. He also published two works against Febronius on papal power, De vi ac ratione Primatus Romanorum Pontificum (Verona, 1766), and De potestate ecclesiastica Summorum Pontificum et Concilorum generalium (Verona, 1765). Works References Mazzuchelli, Gli scrittori d'Italia (Brescia, 1753–63), II, part I, 178 Fabroni, Vitae Italorum doctrina excellentium (Pisa, 1778–1805), XVIII, 109. External links 18th-century Italian Roman Catholic theologians Canon law jurists Brothers People from Verona