Lost Bibliotheca Palatina manuscript identified in university library collection

Written on 05/18/2026
Mark Milligan


A fifteenth-century manuscript held for decades in the collection of Heidelberg University Library has been identified as part of the famed Bibliotheca Palatina, one of the most important libraries of the Renaissance.

The manuscript was bought by Heidelberg University Library from an antiquarian bookseller in 1937, although its connection to the Bibliotheca Palatina was not recognised at the time. Library staff have now identified the codex as part of the historic Renaissance collection, most of which is today split between the Vatican Apostolic Library in Rome and Heidelberg University Library.

The identification was made by Dr Karin Zimmermann from the library’s Department of Historical Collections. The codex, known for its richly decorated binding, has since been assigned the shelfmark “Cod. Pal. lat. 778”, returning it to the Bibliotheca Palatina collection.

Researchers believe the manuscript was produced in the fifteenth century in Constance or Basel for Johannes Zeller, a church official who held positions in several dioceses and prince-bishoprics in the region. According to Dr Thorsten Huthwelker from the Historical Collections department, the contents reflect Zeller’s political and legal interests, particularly his links to the Bishop of Constance.

Among the texts contained in the codex is the Tractatus de iuribus regni et imperii Romanorum by the fourteenth-century scholar Lupold of Bebenburg. Written during disputes between the Holy Roman Emperor and the papacy, the work argued that an elected Roman king possessed full authority without requiring papal approval. The manuscript also contains other texts dealing with constitutional and imperial law.

The manuscript’s binding provided an important clue to its origins. Experts traced it to Elector Ottheinrich of the Palatinate, who ruled in the sixteenth century and played a major role in expanding the Bibliotheca Palatina in Heidelberg. This suggests the codex had already entered the collection by the mid-1500s.

The Bibliotheca Palatina was removed from Heidelberg during the Thirty Years’ War. In 1623, much of the library was taken to Rome as war booty and transferred to the Vatican. Records from a Vatican inventory compiled in 1798 later listed the manuscript as missing.

After disappearing from official records, the codex resurfaced in the collection of English aristocrat Frederick North during the nineteenth century. It later passed through several owners before reportedly entering the possession of Heidelberg-born painter Wilhelm Trübner. Following his death, the manuscript was sold through a Munich antiquarian bookshop, where Heidelberg University Library acquired it in 1937.

The manuscript has now been digitised and added to the “Bibliotheca Palatina – digital” project, an online initiative that virtually reunites manuscripts held in Heidelberg and the Vatican.

The identification marks another chapter in the long and complex history of the Bibliotheca Palatina, often regarded as the most significant German library collection of the Renaissance period.

Header Image Credit : UB Heidelberg

Sources : idw