Sotheby’s public view of the Collection of Jean & Terry de Gunzburg: Design Masters closes on Tuesday, April 21 — the last day collectors, designers, and the broader New York public can walk the galleries at the Breuer building before the April 22 sale takes the rooms off display and turns them into the auction floor for the most valuable single-owner design sale in Sotheby’s history.
If you have been meaning to see the Claude Lalanne YSL mirror ensemble in person, tomorrow is the deadline.
What’s Actually in the Rooms
The preview has been open at the Breuer building since April 10. Approximately 135 works are installed across the galleries — the core of the couple’s Paris, London, and New York interiors, much of it assembled in consultation with Jacques Grange, the French decorator whose client list reads like a private directory of late-20th-century taste.
The design sale alone carries a $30 million to $44 million pre-sale estimate. Combined with the art holdings that follow in Sotheby’s May Marquee Evening Sales, the full de Gunzburg disposition is expected to clear $67 million to $99 million — a number that would place the sale in rare air even by Sotheby’s historical standard.
The Lots Worth Seeing in Person
Some pieces are made for photographs. These are not those pieces. The de Gunzburg catalog is a walk-through-it sale — the kind of preview where what you experience in the Breuer’s low-ceilinged concrete galleries is meaningfully different from what arrives in print.
The headliners:
- Claude Lalanne’s 15-mirror ensemble — created for the music room of Yves Saint Laurent and Pierre Bergé. Estimated $10 million to $15 million. The top lot of the sale, and the single most important piece of 20th-century French design to reach the market in years.
- Jean Royère “Ours Polaire” sofa and armchairs — $600,000 to $800,000 each. The most iconic silhouette in Royère’s catalog, in a set.
- Alexandre Noll cabinets (pair) — $700,000 to $1 million. Sculpted hardwood, the kind of blue-chip Noll that appears in major collections once every few auction cycles.
- Jean-Michel Frank armchairs (pair) — $250,000 to $350,000. The Frank name anchors any serious 20th-century design catalog.
- André Groult cabinet (circa 1926) — $600,000 to $800,000. A period landmark, and one of the rarer Groult appearances in recent memory.
- Paul Dupré-Lafon cabinets (pair) — $300,000 to $500,000. Dupré-Lafon’s bronze-and-leather hardware detailing in person is worth the visit alone.
Beyond the catalog headliners, works by François-Xavier Lalanne, Alberto Giacometti, Eugène Printz, Pierre Chareau, Marc du Plantier, Jean Dunand, Émile-Jacques Ruhlmann, and Armand-Albert Rateau round out a roster that reads like a reference shelf on French 20th-century design.
Why This Preview Is Historic on Its Own
This is the first standalone single-owner design auction held at Sotheby’s Breuer home since the house consolidated its New York operations in the former Whitney / Met Breuer building. The galleries were designed for art — the move of a major design catalog into the same rooms is a deliberate signal from Sotheby’s that the Breuer will function as the house’s permanent marquee platform, regardless of medium.
The architecture itself has a role in the preview. The Breuer’s concrete trapezoidal windows, its cantilevered stair, and its low-ceilinged granite galleries were conceived for modernist painting and sculpture. Against that backdrop, the de Gunzburg installation reads differently than it would in a traditional gilded saleroom: the Lalannes, the Royères, and the Art Deco cabinetry all gain scale and weight.
For the New York design community, the preview has functioned as a twelve-day exhibition with a sale at the end. Tuesday is the last day to walk it.
The Numbers Behind the Rarity
Single-owner design sales at this level are not annual events. Sotheby’s sold the François-Xavier Lalanne hippopotamus bar in December 2025 for $31.4 million — a world record for the artist and a market-setting number for a single design lot. That result is the reference point for the Lalanne ensemble in tomorrow’s catalog: the YSL mirrors carry the provenance, the set completeness, and the auction context to rewrite design market records if two serious collectors engage.
How to See It Before the Gavel
- Preview Location: Sotheby’s Breuer Building, 945 Madison Avenue, New York
- Final Preview Day: Tuesday, April 21, 2026
- Sale Date & Time: Wednesday, April 22, 2026 at 10:00 AM EDT
- Admission: Free and open to the public during posted preview hours
For collectors in town, for designers building reference libraries, and for anyone who has tracked the Lalanne market since the Saint Laurent sales of 2009, the de Gunzburg preview is the single most important week in New York’s spring calendar. By Wednesday morning, the galleries are closed to the public and the room is for paddles only.
Sources
- Sotheby’s — Collection of Jean & Terry de Gunzburg: Design Masters (Official Series Page)
- Sotheby’s — Digital Catalogue
- Galerie Magazine — Landmark Single-Owner Design Sale at Sotheby’s
- Wallpaper* — This Sotheby’s Auction Could Mark the Most Valuable Design Sale of All Time
- ARTnews — Sotheby’s to Auction Jean and Terry de Gunzburg Collection
