A rare 16th-century legal text, missing since 1945, was found in a charity shop in Flörsheim, Hesse. The book, a copy of the Pauli Sententiae printed in Nuremberg in 1594 by Paul Kaufmann in the Gerlach workshop, was identified through a seal, an ex-libris (a bookplate indicating ownership), and catalog checks. After more than 80 years of absence, it was returned to the Staatsbibliothek zu Berlin. The discovery was made by Florian Barthel, a social worker, who was examining a delivery intended for Tisch und Teller, a solidarity shop run by the Diakonie in Flörsheim, near Frankfurt. Among the books was a volume dated 1594, whose condition appeared unusually good for its age. The book was confirmed to be from the edition of the Pauli Sententiae listed under the reference VD16 P 1060 in the Deutsche Digitale Bibliothek. The Pauli Sententiae is a legal text traditionally attributed to the Roman jurist Julius Paulus, but modern studies suggest it is a later compilation based on his works. The 1594 edition is part of a long history of Roman law transmission, notably influenced by the 16th-century French jurist Jacques Cujas. An old seal from the Königliche Bibliothek zu Erfurt, the ex-libris of Philipp Wilhelm von Boineburg, and the name of Robert Königsmann provided initial clues for the investigation. Andrea Langner from the University Library of Erfurt and Michaela Scheibe from the Staatsbibliothek zu Berlin compared these clues to catalogs. The book had belonged to Robert Königsmann, a rhetoric professor in Strasbourg, whose library contained about 850 volumes. After his death, Johann Christian von Boineburg acquired the entire collection and passed it on to his son Philipp Wilhelm, who then donated it to the University of Erfurt in 1716. The university itself did not sell this book to Berlin in 1908, as it had been dissolved in 1816, with its collections passing to the Prussian Royal Library of Erfurt. A large number of manuscripts and printed works were subsequently transferred to the Royal Library of Berlin in 1908–1909. The Berlin catalog lists this copy among the war losses since 1945. The book's itinerary during the conflict remains partially mysterious. The Diakonie and librarians cited by Hessenschau estimate "with very high probability" that the book was evacuated from Berlin to the potash mine of Hattorf, in Hesse, before disappearing. This hypothesis aligns with the history of the collections, as the Staatsbibliothek indicates that about 1.5 million volumes had been stored in Hattorf before their transfer to Marburg after the war. A note published by the University Library of Erfurt associates the book with a set from the "G" series kept during the conflict in a potash mine located in the Göttingen district. Without other publicly available elements, the passage of this specific copy through Hattorf cannot be considered absolutely established. After the discovery, Florian Barthel contacted several parties, and the research led to the libraries of Erfurt and Berlin. About two weeks were sufficient to establish the provenance and organize the return. Since the end of August, the printed work has re-entered the collections of the Staatsbibliothek zu Berlin, where it is listed again in the catalog and can be consulted by researchers. Its remarkable state of preservation had raised initial doubts. More than four centuries after its printing and 80 years after being reported missing, it is the traces left by its successive owners—seal, ex-libris, and handwritten note—that have enabled its provenance to be restored.