Connecticut's Litchfield County Auctions has discovered a long-lost still-life by Paul Gauguin. The work was consigned by a retired Manhattan antiques dealer who had purchased it from a collector in the 1980s; he then hung the painting for 30 years in his own home without knowing the artist.

Initials PG were deciphered by the auctioneer, reports The Art Newspaper. The painting was then authenticated by Paris-based Wildenstein Institute as likely "Summer Flowers in a Goblet," painted in 1885 by Gauguin.

The Gauguin will be offered on June 29 with an estimate of $800,000 to $1.2 million.