United by a singular vision, collectors and philanthropists Theodore and Ruth Baum’s passion for life, art, design and philanthropy led them on a deeply personal, decades-long pursuit to cultivate an extraordinary collection – one that was not only among the most distinguished private collections encapsulating the developments of 20th-century art history, but reflective of the forward-thinking vision, refined elegance and intellectual rigor that defined them as partners in life and collecting.
As storytellers in every sense, the Baums were guided by their insatiable curiosity as they built a collection that transcended movements, generations and geographies. Throughout the course of two decades, they traveled around the world in pursuit of great works by the visionaries of American abstraction, the innovators of Pop, Minimalism and Conceptualism, and the radical experimenters of post-war Italian art, assembling a constellation of artists engaged in dialogue with one another, each work challenging and illuminating its counterpart.
“Ted and Ruth were among the most committed collectors of their generation. I was immediately struck by their inquisitiveness and the deep level of their research. No doubt they came to European abstraction via the touch points of post-war American abstraction. They instinctively understood that artists like Lucio Fontana and Yves Klein were vital to the history of 20th-century abstraction and could sit perfectly well situated in their beautiful interiors alongside Rothko, de Kooning, Mitchell and others. Every work to enter their collection had to pass their extremely high bar of research and curation. Relationships mattered to them, and they cultivated them assiduously. It shows in the deep level of quality that’s a hallmark in this collection.”
The collection is highlighted by a radiant red-and-orange 1967 painting by Mark Rothko, their first acquisition of contemporary art 43 years ago and the catalyst of their collecting journey; alongside an expansive canvas by Joan Mitchell, also held in the Baum’s collection for four decades and making its auction debut this November; an early text painting by Ed Ruscha; post-war European masterworks by Alberto Burri and Lucio Fontana; and more.
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Vision: The Extraordinary Collection of Theodore and Ruth Baum
By Sotheby's | Oct 8, 2026A landmark collection of postwar and contemporary art, estimated to exceed $100 million, featuring works by Rothko, Mitchell, Ruscha, Burri, Warhol, Fontana and more, many appearing at auction for the first time in decades.
United by a singular vision, collectors and philanthropists Theodore and Ruth Baum’s passion for life, art, design and philanthropy led them on a deeply personal, decades-long pursuit to cultivate an extraordinary collection – one that was not only among the most distinguished private collections encapsulating the developments of 20th-century art history, but reflective of the forward-thinking vision, refined elegance and intellectual rigor that defined them as partners in life and collecting.
Theodore and Ruth Baum's Palm Beach residence. Art © Estate of Joan Mitchell. Art © The Estate of Tom Wesselmann / Artists Rights Society (ARS), New York. Art © Carl Andre / Licensed by VAGA at Artists Rights Society (ARS), New York. Art © Antony Gormley 2026. All rights reserved. Art © 2026 Michelangelo Pistoletto. Photograph by Diana Todorova As storytellers in every sense, the Baums were guided by their insatiable curiosity as they built a collection that transcended movements, generations and geographies. Throughout the course of two decades, they traveled around the world in pursuit of great works by the visionaries of American abstraction, the innovators of Pop, Minimalism and Conceptualism, and the radical experimenters of post-war Italian art, assembling a constellation of artists engaged in dialogue with one another, each work challenging and illuminating its counterpart.
Highlights from the Collection
Type: lot
Mark Rothko
Untitled, 1967
Type: lot
Joan Mitchell
Green Book of Barbara Guest, 1960
Type: lot
Ed Ruscha
Dimple, 1964
Type: lot
Andy Warhol
The Scream (After Edvard Munch), 1984
Type: lot
Alberto Burri
GA1, 1954
Type: lot
Lucio Fontana
Concetto Spaziale, Attese, 1960
Type: lot
Andy Warhol
The
