ArtLex
Art Lex: Composition
This online dictionary of art terms from Artlex is a valuable tool. The composition page explains how the term is used in the world of art. There are related links and works of art to explore.
Khan Academy
Khan Academy: Italian Gold Ground Painting
Many of the early works in the paintings collection of the J. Paul Getty Museum are altarpieces and fragments of altarpieces made for Italian churches. They were placed above altars and served as the focal point of the Mass. Churches in...