A painting discovered in a French family’s attic is believed to be a long-lost Caravaggio and could sell at auction for $170 million. That result for Judith and Holofernes (ca. 1607) would constitute a major coup for the family, as well as the auctioneer and dealer organizing the sale—or more than 1,100 times Caravaggio’s current auction record.

The painting, thought to be the Baroque master’s long-lost second version of the bloody biblical scene of Judith beheading Holofernes, is coming to auction with an astounding presale estimate between €100 million and €150 million ($113.2 million–$169.7 million). Such sums are rare enough in Christie’s and Sotheby’s high-stakes sales of modern and contemporary trophies in New York and London, but Judith and Holofernes will be offered on the evening of June 27th in Toulouse, France.