Codex Vindobonensis 751

The Codex Vindobonensis 751, also known as the Vienna Boniface Codex, is a ninth-century codex, comprising four different manuscripts, the first of which is one of the earliest remaining collections of the correspondence of Saint Boniface. The codex is held in the Austrian National Library in Vienna.

The section containing the Bonifatian correspondence dates from the ninth century, and was most likely copied in Mainz—Boniface had been appointed archbishop of Mainz in 745, and the copyist used originals of the letters available there. The codex was later moved to Cologne, where it was marked (on 166v) as belonging to the library of the Cologne Cathedral.

The modern history of the codex begins in 1554 when Kasper von Niedbruck, who had entered the service of Maximilian II in that year, found the manuscript in Cologne and brought it to Vienna. Von Niedbruck collected materials to aid with the composition of the Magdeburg Centuries (a comprehensive church history first published in 1559), and gathered many manuscripts for the Imperial Library, which he allowed Matthias Flacius and his collaborators to copy. As indicated in von Niedbruck's correspondence, the codex was sent to George Cassander after September 1755. Next mention of the codex is in the catalog entry by Hugo Blotius, the first librarian of the Imperial Library, in 1597. Correspondence between Sebastian Tengnagel of the Imperial Library and Johann Pistorius, confessor to Rudolf II, indicates that the codex was in Prague, whence Tengnagel had sent it to Nicolaus Serarius in Mainz who used it to publish his edition of the Bonifatian correspondence (1605). Corrections and notes in the hands of Tengnagel and Blotius prove that they had already worked on copying and editing the correspondence before the codex was sent to Prague.

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