Delaware Gap is a monumental Abstract Expressionist painting by Franz Kline, created in 1958 and held in the permanent collection of the Hirshhorn Museum and Sculpture Garden in Washington D.C. The composition is dominated by sweeping, gestural brushstrokes of black paint across a white ground, exemplifying Kline's signature Action Painting style that transformed landscape references into powerful abstract forms. Kline achieved his stylistic breakthrough around 1949 by projecting and enlarging details of city scenes to mural scale, using house painters broad brushes to create the bold, spontaneous marks seen here. This work is a gift of the Joseph H. Hirshhorn Foundation from 1966 and represents one of the defining achievements of mid century American abstraction.