Legality of Cannabis by U.S. Jurisdiction Artist groups and collectives active during the 20th century in art. For other arts related groups and societies, see Category: Arts organizations established in the 20th century. Pages in category "20th-century art groups" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. B BLK Art GroupE EXIT (performance art group)R Royal Scottish Society of Painters in WatercolourS StuckismT The Stars Art GroupU Urban Art (group)