The doctor and philosopher Isacco Lampronti (1679-1756) was the author of an impressive work: a Talmudic encyclopaedia entitled Paḥad Itzhak ("The Fear of Isaac"). It is a repertoire in alphabetical order of all the maxims, rites, canons, laws, Talmudic institutions, with an indication of the passages of the Talmud, from where they are extracted and the authors who wrote them. The first volume and the first part of the second are published in Venice (1750 and 1753) while he was alive; after his death (1756) the second part of the second volume (Venice, 1796), the third volume (Venice, 1798), the fourth (Reggio, 1813) and the fifth (Livorno, 1840) were printed; of the remaining nine volumes, five would be published in Lyck (1864-74) and four in Berlin (1885-88). The complete manuscript is in Paris, purchased in 1840 by Louis Philippe for the National Library.