A prized manuscript in the University of Michigan library that was believed to have been written by the famed Italian astronomer Galileo Galilei is a forgery, the university said.
“Wilding concluded that our Galileo manuscript is a 20th-century fake executed by the well-known forger Tobia Nicotra,” the university said. “After our own experts studied his most compelling evidence — about the paper and provenance — and reexamined the manuscript, we agreed with his conclusion.”
Nicotra was jailed for two years in 1934 for forgery, including Galileo documents, the statement noted.
The university is now reconsidering the manuscript’s role in its collection.
A portrait of Galileo Galilei painted in 1636. Credit: Imagno/Getty Images
Before the forgery determination, the document was described by the university as “one of the great treasures of the University of Michigan Library.”
It purported to show notes recording Galileo’s discovery of Jupiter’s four moons.
“This was the first observational data that showed objects orbiting a body other than the Earth,” the university’s description of the manuscript states. “It reflects a pivotal moment in Galileo’s life that helped to change our understanding of the universe.”
The University of Michigan acquired the manuscript in 1938 after it was bequeathed to the library by a Detroit businessman, Tracy McGregor, who was a collector of books and manuscripts, it said.
When McGregor obtained it, the document had been authenticated by Cardinal Pietro Maffi, who was the Archbishop of Pisa and who “compared this leaf with a Galileo autograph letter in his collection,” the university said.