Signals / 15 Sep 2026
One of the defining collections of postwar art is coming apart for sale. Christie's will disperse the Antonio Homem Sonnabend Collection across Evening Sales in London, Paris and New York this fall, with an estimate above $50 million and works by Warhol, Johns, Rauschenberg, Lichtenstein and Koons — material assembled by the dealers who built the market for it in the first place. At the opposite end of the price scale, a Gertrude Abercrombie canvas bought for $30 at an estate sale, authenticated off an archival photo found in a Milwaukee Art Museum catalog, carries a $150,000–$250,000 estimate at Freeman's. And a $6.7 million lawsuit over fake Warhols running through Florida, Peru and Philadelphia is a reminder that the provenance you don't check is the one that costs you.
Christie's will offer more than $50M of the Antonio Homem Sonnabend Collection across London, Paris and New York this fall, while a $30 estate-sale Gertrude Abercrombie carries a $150,000–$250,000 estimate at Freeman's.
Christie's to offer the Antonio Homem Sonnabend Collection this fall across London, Paris and New York, estimated above $50M with works by Warhol, Johns, Rauschenberg, Lichtenstein, Koons and Schifano
Sonnabend provenance is about as good as postwar paperwork gets, and single-owner sales of this depth tend to reset the comparables for everything else in those artists' markets — worth preparing for specific lots now rather than reacting to the results.
auction record · Blue-chipAntonio Homem Sonnabend, who ran Sonnabend Gallery for decades and opened the Sonnabend Collection Mantova museum in 2025, died in March 2026
Homem was the adopted son of Ileana and Michael Sonnabend and spent his career sustaining the program that introduced American Pop to Europe and European conceptual work to New York; his estate's decision to sell releases a body of long-held material and funds an endowment for the Mantova museum, which means unusually clean chains of ownership entering the market this season.
artist milestone · Blue-chipGertrude Abercrombie canvas bought for $30 at an estate sale carries a $150,000–$250,000 estimate at Freeman's, with bidding opening at $75,000 after authentication by scholar Susan Weininger
Scholarship, a museum survey and an auction house are now working the same catalogue at once, and a result above the high estimate would put a public floor under every other Abercrombie in private hands.
auction record · Growth · Gertrude AbercrombieAustin Uzor's HIBISCUS and LAND DEVOTION V (both 2026) enter the Clark Collection via Tanya Weddemire Gallery, joining holdings of El Anatsui, Zanele Muholi, Amy Sherald and Kerry James Marshall
Placement into a collection at that level typically precedes institutional interest by a year or two, and Uzor's Armory debut with Weddemire next week gives the market its first broad look at pricing.
museum acquisition · Growth · Austin UzorMarlow Moss, the De Stijl pioneer who lost much of her work in a 1944 studio fire, gets her first London show in decades at Ward Moretti
Thin surviving output and a historically suppressed reputation are the conditions under which rediscovery repricing tends to be steepest, but this is a dealer show, not a museum one — the confirming signal would be a public institution buying.
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