THE VALMADONNA LIBRARY EXHIBITION by Sotheby's is profiled by Edward Rothstein in the New York Times. Excerpt:

These 13,000 books and manuscripts were primarily collected by one man, Jack V. Lunzer, who was born in Antwerp in 1924, lives in London and made his fortune as a merchant of industrial diamonds. The collection’s geographical scale is matched by its temporal breadth, which extends over a millennium. But this endeavor is not just an exercise in bibliophilia. These are all books written in Hebrew or using Hebrew script, many of them rare or even unique. Most come from the earliest centuries of Hebrew printing in their places of origins and thus map out a history of the flourishing of Jewish communities around the world.

The collection’s historical gaps and boundaries are also revealing because they often implicitly mark periods of decline, which, we learn elsewhere, often meant public conflagrations of copies of these very books or even exterminations of the communities themselves.

The collection, named after the Italian town that Mr. Lunzer’s family has long been associated with, is known as the Valmadonna Trust Library. Sotheby’s has put it on sale as a single collection. Through next Thursday it is being handsomely displayed to the public, while luring the large institutional libraries and collectors who might be prepared to pay at least $40 million for what Sotheby’s, echoing scholars in the field, describes as “the finest private library of Hebrew books and manuscripts in the world.”

Background here.