Louis Kahn (1901–1974) was an American architect celebrated for his monumental, geometric structures that blended modernism with timeless materiality. Born in Estonia, he immigrated to the United States and later became a professor at the University of Pennsylvania, shaping architectural education. His masterpieces, including the Salk Institute, Kimbell Art Museum, and National Assembly of Bangladesh, are distinguished by bold forms, expressive light use, and profound spatial organization. Kahn viewed structure and material as carriers of meaning, elevating architecture beyond function. His philosophical approach left a lasting legacy, profoundly influencing generations of architects and redefining 20th-century design principles.