A new online platform called Leonardotheka launched on Monday, reuniting for the first time in over 400 years two major collections of Leonardo da Vinci's writings and drawings: the Codex Atlanticus, held by the Veneranda Biblioteca Ambrosiana in Milan, and around 550 sheets from the Royal Collection Trust in Windsor Castle. The manuscripts were originally part of the same group created between the mid-1470s and 1519, but were separated shortly after da Vinci's death by sculptor Pompeo Leoni, who divided the folios into empirical and artistic categories. The digital archive, the result of a decade-long collaboration among the Royal Collection Trust, the Veneranda Biblioteca Ambrosiana, and the Biblioteca Leonardiana in Vinci, includes fifty confirmed page reconstructions and digitally restored pages.
This reunification matters because it restores a fragmented body of work that scholars and the public have been unable to study as a whole for centuries. The platform sets a precedent for cultural institutions retaining intellectual ownership of digital projects rather than outsourcing them to commercial platforms, as emphasized by Roberto Ferrari of Museo Galileo. In an era of rapidly evolving artificial intelligence, Leonardotheka demonstrates the value of scholarly institutions directly shaping the tools through which shared heritage is explored, offering new insights into da Vinci's inventions and techniques.