French artist JR brings a monumental wave to the façade of the Vatican Apostolic Library with DILUVIUM, a site-specific installation exploring the fragility of memory and the preservation of knowledge. Unveiled on September 14th, 2026, the work forms part of AQVA. Catastrophe and Wonder, the inaugural exhibition in the Library’s five-year Catastrophe and Wonder cycle, opening to the public on September 25th and running through May 14th, 2027.
Where knowledge meets its greatest fear
Stretching approximately 70 metres across the Renaissance façade facing the Cortile del Belvedere, DILUVIUM depicts an enormous black-and-white wave seemingly about to crash into the historic building. JR drew on Gustave Doré’s 1866 illustrations of the biblical Great Flood, enlarging the nineteenth-century image to architectural scale and placing it against a building devoted to safeguarding centuries of human knowledge.
The work responds to a very real threat facing the Vatican Apostolic Library: water can cause irreversible damage to books, manuscripts and archival materials. JR extends the metaphor to climate change, political polarisation and the growing influence of artificial intelligence, linking physical destruction to wider anxieties surrounding the future of knowledge.
Two waves, one question about what we preserve
Inside the Library, UNDAE offers a quieter counterpart to DILUVIUM. Installed in the Barberini Room, the work shows a black-and-white video of a wave recorded in Brazil, extending JR’s imagery from the monumental façade into the intimate space of the Library.
The two works frame AQVA’s exploration of water and the written word, tracing threats to books from water and fire to light, insects and human intervention, while connecting these dangers to broader fears and hopes. JR’s installations enter into dialogue with works by American typographer Bill Moran, gastronomic texts by Italian chef Fulvio Pierangelini and historical holdings from the Vatican Library, including two copies of Ippolito Salviani’s Aquatilium animalium historia, first published in 1557.
At the centre of DILUVIUM lies a striking paradox: books preserve human thought across centuries, yet the fragile paper carrying those ideas remains vulnerable to destruction. By placing a wave directly across the architecture protecting this accumulated knowledge, JR makes preservation itself the subject, raising questions about what can survive and what humanity chooses to carry forward.
JR
Diluvium,, Vatican, 2026.
Courtesy of JR
