Like its contents, the history of ownership of the Voynich manuscript is contested and filled with some gaps. The codex belonged to Emperor Rudolph II of Germany (Holy Roman Emperor, 1576-1612), who purchased it for 600 gold ducats and believed that it was the work of Roger Bacon. It is very likely that Emperor Rudolph acquired the manuscript from the English astrologer John Dee (1527-1608). Dee apparently owned the manuscript along with a number of other Roger Bacon manuscripts. In addition, Dee stated that he had 630 ducats in October 1586, and his son noted that Dee, while in Bohemia, owned “a booke…containing nothing butt Hieroglyphicks, which booke his father bestowed much time upon: but I could not heare that hee could make it out.” Emperor Rudolph seems to have given the manuscript to Jacobus Horcicky de Tepenecz (d. 1622), an exchange based on the inscription visible only with ultraviolet light on folio 1r which reads: “Jacobi de Tepenecz.” Johannes Marcus Marci of Cronland presented the book to Athanasius Kircher (1601-1680) in 1666. In 1912, Wilfred M. Voynich purchased the manuscript from the Jesuit College at Frascati near Rome. In 1969, the codex was given to the Beinecke Library by H. P. Kraus, who had purchased it from the estate of Ethel Voynich, Wilfrid Voynich’s widow.