Robert Motherwell's *The Berggruen Series* is a collection of signed artist's proofs rendered in pencil, exemplifying the Abstract Expressionist master's commanding use of bold, gestural forms and lyrical abstraction. Co-published by prominent galleries in Paris, San Francisco, and New York, the works reflect Motherwell's deep engagement with the interplay between spontaneity and intellectual rigor. The series, drawn from a limited edition of 100, stands as a testament to his enduring influence in postwar American art and his sophisticated exploration of line, mark-making, and visual poetry.