

An Italian count and mathematician whose audacious theft of 30,000 rare books made him one of history's most infamous bibliomanes.
Guglielmo Libri Carucci dalla Sommaja was a man of aristocratic bearing and formidable intellect, a mathematician elected to prestigious academies. His life took a dark turn when he was entrusted with the care of France's literary treasures as Inspector of Libraries. Behind this veneer of scholarly duty, Libri orchestrated a breathtakingly systematic plunder, smuggling priceless manuscripts and early printed books out of the country. When authorities finally grew suspicious, he fled to England with an astonishing hoard packed into eighteen trunks. Living out his days in exile, he sold his loot to collectors, scattering a unique cultural heritage. His story remains a cautionary tale of how a passion for knowledge can curdle into destructive obsession.
The biggest hits of 1803
The world at every milestone
He was a respected scholar who published works on the history of mathematics.
His full name includes the noble titles 'Carucci dalla Sommaja'.
Some of the stolen works were returned after his death, but many remain missing to this day.
He defended his actions by claiming he was rescuing the books from neglect.
“A rare manuscript is a silent witness to the vanity of its collectors.”