La Gioconda
Painted between 1503-1519, Leonardo da Vinci's portrait revolutionized painting through sfumato technique—the subtle blending of tones that creates an atmospheric haze. The subject's enigmatic smile, the aerial perspective of the landscape, and the psychological depth of the gaze established a new standard for portraiture.
Defined the concept of the 'masterpiece' in Western culture. Its combination of technical innovation, psychological complexity, and cultural mythology makes it the most recognized artwork in human history.