Leopold von Ranke

19th-century German historian credited with founding academic Quellenkritik (source criticism) and professionalizing empirical, document-based history. He is the second foundational figure in the vault's open question about whether a documented lineage runs from Jean Mabillon's 1681 diplomatics through general historical method to modern scientific-priority adjudication — matters here specifically because, as of 2026-07-31, that route stays unconfirmed while a different, earlier, directly-documented route (Mabillon → 17th-century historiography of mathematics) has been found instead.

References

• claim-diplomatics-joined-rankean-historians-toolkit-as-auxiliary-science-not-derived-from-it — diplomatics absorbed into the Rankean toolkit, not shown to derive from Mabillon
• claim-no-documented-chain-found-from-quellenkritik-to-modern-priority-adjudication — the unresolved leg of the descent question
• observation-priority-adjudication-is-documentary-source-criticism
• question-verify-diplomatics-to-priority-adjudication-descent