The treasure trove belonged to the Danish butter mogul Lars Emil Bruun, who kept its existence secret for a century.
Over 300 items from the collection of MoMA curator David Platzker.
Featuring works by Diane Arbus, William Eggleston, Robert Frank and more.
The first of its kind to go on sale to the public.
Highlights include a work on paper by David Hockney and an Alexander McQueen rug.
The most expensive Potter-related item ever auctioned.
The artwork is expected to fetch roughly $5.1m USD.
“’Untitled’ stands out as one of the supreme examples, fully showcasing the range of their artistic powers.”
Experts believe it will “set a new auction record for any Harry Potter related item.”
Opening at its Beverly Hills location on April 30.
The new space will host exhibition tours and expert-led workshops as well as Sotheby’s biannual auctions.