Abstract
This paper interprets the aspect meaning the representational medium in architectural planning of the pictura in Alberti's architectural theory. This interpretation was made on the basis of our interpretation of the lineamentum and by analyzing the use of the pictura among the theories of his. The result is as the following; the aspect means, essentially, the two-dimensional representational medium that represents a body as the signum (figure) on a certain picture-plane, as it were, the drawing, more exactly, the plan. But in this case, the main is as it were, the set of ground plan, elevation, and section, in a word, the ground plan-elevation-section rather than the solid-figure plan of interior, exterior, background, landscape, etc..
