Alfred Stieglitz was an American photographer, publisher, curator, and tireless advocate for photography as a fine art. Born in Hoboken, New Jersey, and educated partly in Germany, Stieglitz helped transform photography from a documentary medium into a serious modern art form. In 1902, he founded the Photo-Secession movement, promoting photographers whose work emphasized atmosphere, composition, and personal expression. Through his influential journal Camera Work and his New York gallery “291,” he introduced American audiences to both pioneering photographers and European modernists, including Picasso, Matisse, and Cézanne. Stieglitz’s own photographs, from intimate portraits to his celebrated cloud studies known as Equivalents, explored mood, abstraction, and emotional resonance. He also created a powerful photographic record of artist Georgia O’Keeffe, his wife and frequent subject. His legacy rests not only in his images, but in his role in shaping modern art in America.