This band groups every entry by its own art form, the physical or performed shape a work or a maker's practice takes. Painting, sculpture, architecture, music, performance and photography each name a different discipline with its own materials, methods and history, and a reader arriving here is choosing a medium first rather than an artist, a movement or a single work. The six art forms recognized in this atlas follow the National Core Arts Standards' five disciplines with architecture added as its own line, matching how the field itself organizes training, criticism and institutions.