This monumental 1964 lithograph is a landmark work from Robert Rauschenberg's groundbreaking collaboration with Universal Limited Art Editions (ULAE), representing one of the largest hand-pulled lithographs created at the time. Layering transferred photographic imagery—including a reclining nude referencing Velázquez, an oversized key, architectural fragments, and standing figures—Rauschenberg dissolves the boundary between fine art printmaking and his signature combine aesthetic. Signed and numbered from an edition of 40, *Breakthrough I* exemplifies the artist's pivotal role in redefining the lithographic medium during the 1960s and remains a highly sought-after work in his printed oeuvre. Its dramatic scale, rich tonal contrasts, and visual complexity make it a cornerstone acquisition for any collection focused on postwar American art or the evolution of artist prints.