Knock, Knock Poster 1975

"Knock, Knock Poster" is a 1975 print by Roy Lichtenstein, known for his pop art style. It depicts a simple black-and-white illustration of a closed door with two "KNOCK" signs bursting through, creating a dynamic sense of movement. Lichtenstein’s work often references popular culture, and this piece, though minimalist in design, evokes a common everyday experience, adding a playful twist to his signature bold graphic style.