The Seder HaDorot or "Book of Generations" (completed 1725, published 1768) by Lithuanian Rabbi Jehiel Heilprin (1660–1746) is a Hebrew-language chronological work that serves as a depot of multiple Hebrew language chronological books and manuscripts. The work presents all given dates in the Hebrew calendar format. As well, Heilprin analyzed alternating and sometimes conflicting dates to produce a final decision and/or at times presents two plausible dates for a given event.