Four artworks by Wyeth family members will be auctioned later this month in Thomaston, including a painting of the Olson House featured in one of Andrew Wyeth’s most beloved works.

The two-day event at Thomaston Place Auction Galleries will include a 1942 rendering by Andrew Wyeth of the Olson House, the location in Cushing featured in his famed painting, “Christina’s World.”

Two other works by Andrew Wyeth, as well as a painting by his son, Jamie, will be featured in the auction on Saturday and Sunday, August 25 and 26.

Carol Achterhof, auctioneer and appraisals and branding specialist with Thomaston Place, said initial price estimates for the Wyeth pieces are conservatively based on historical sales records and could increase as prospective buyers place bids, which will be taken live in the auction hall, through absentee and phone bids, as well as online.

“The final selling prices for these items may exceed these estimates, given the popularity of Wyeth artwork, particularly in this area,” Achterhof said.

“The Olson House, Cushing, Maine,” a study with an estimated price between $75,000 and $125,000, was given as a gift by Andrew Wyeth and his wife Betsy to Anna Christina Olson, the inspiration for his best-known work, and her brother, Alvaro. The picture has its own interesting history, according to a release from the auction house.

John W. Olson, Sr., a nephew of Christina and Alvaro Olson, said he had been raised and done farm work there and was showing the property to his wife shortly after Christina died in January 1968.

“She had never been through the house, so I gave her a tour and showed her the room where I was born. My father came shortly after we got there to start cleaning things out,” Olson recalled. “My wife found this painting on the floor of the studio in Alvaro’s bedroom and said, ‘I’d like to have this,’ and my father said, ‘Sure.’”

Olson displayed the work in his restaurant before it was stored in a bank vault and later loaned for display in The Farnsworth Museum in Rockland. A video interview with Olson is available online at www.youtube.com/watch?v=IVEGpeqYRKc.

The remaining Wyeth items at the auction include Andrew Wyeth’s 1946 watercolor “Spruce Timber,” estimated to sell for between $100,000 and $200,000; an original Andrew Wyeth watercolor remarque depicting the Olson House painted on the endpaper from a copy of the 1968 art folio book “Andrew Wyeth,” estimated between $3,000 and $5,000; and “Fog,” a signed, oil-on-linen painting by Jamie Wyeth. The younger Wyeth’s work carries the highest projected price tag of the auction, with an estimate of between $200,000 and $250,000.

Achterhof noted that Thomaston Place has sold other Wyeth items in the past, including a painting titled “Great Blue Heron” by N.C. Wyeth, Andrew’s father, in 2012 for $253,000; an Andrew Wyeth painting of Ridge Church in Martinsville, in 2010 for $230,000; an Andrew Wyeth graphite drawing that sold in 2005 for $148,500; and a watercolor and ink painting in May 2009 for $148,500.