During the late 1950s and early 1960s Frank Stella was a significant figure in the emergence of Minimalism, Post-Painterly Abstraction and Color Field painting. His shaped canvases of the 1960s like "Harran II," 1967, revolutionized abstract painting. One of the most important characteristics of Stella's paintings is his use of repetition. His "Black Pin Stripe paintings" of 1959 startled and shocked an art world that was unused to seeing monochromatic and repetitive images, painted flat, with almost no inflexion. During the early 1960s Stella made several series' of notched "Aluminum Paintings" and shaped "Copper Paintings" before making multi-colored and asymmetrical shaped canvases of the late 1960s. Frank Stella's approach and relationship to Color Field painting was not permanent or central to his creative output; as his work became more and more three-dimensional after 1980.