Harry Callahan (1912–1999) was one of the most influential American photographers of the second half of the twentieth century. Callahan’s highly original oeuvre involved a wide-ranging exploration of photographic techniques including experimentation with exposures, a strong sense of line and form, and light and darkness. A crucial addition to Callahan’s critical presence and leading to a deeper understanding of the photographer’s greater impact on the techniques and styles of modern photography, Harry Callahan: The Street explores the artist’s lesser-known works, focusing on his black-and-white and colour street photographs. Bringing together documentary work, still life and staged photographs—many of his wife, whom he photographed throughout his life—this important review sheds new light on Callahan’s personal and pioneering approach.