n.
Art or technique of producing images on a surface, usually paper, by means of marks in graphite, ink, chalk, charcoal, or crayon.
It is often a preliminary stage to work in other media. According to Giorgio Vasari , disegno (drawing and design) was the foundation of the three arts of painting, sculpture, and architecture. Beginning in the Italian Renaissance, debate arose regarding the role of drawing, as some saw it as an independent art form and others saw it as a preliminary stage in creating a painting or sculpture. By the 17th century, drawings had definite market value; connoisseurs specialized in collecting them, and forgers began to exploit the demand. In the 20th century, the drawing became fully autonomous as an art form, figuring significantly among the works of virtually every major artist, and the line itself was exploited both for its representational and its purely expressive qualities.