Timothy O'Sullivan was a pioneering American photographer in the 1860s-70s who worked for the US government to document the American West. He took realistic, unromanticized photos that depicted the landscapes, indigenous peoples, and mining towns he encountered. Rather than stage photos, O'Sullivan captured everyday life, from Native Americans in traditional and modern dress to settlers in mining towns. His photos gave Eastern audiences a glimpse of the vast, untamed West and helped shape popular conceptions of that time and place.