1897-1976 1945- 1948- 20thcentury adams american architectural art arts beuys breda casestudies communityartsprojects conceptualart criticismandinterpretation criticismandinterpretationmartins decorationandornament dennis earthworks(art) ecologyinart environmentalprotectioninart exhibitions federalaidtothearts fills(earthwork) gardens helen helenelizabeth history installations(art) joseph long martins modern motives municipal nature(aesthetics) netherlands nieubethesda outsiderart performanceart pictorialworks publicart refuseandrefusedisposalinart richard sculpture site-specificart southafrica spain styles themes topiarywork unitedstates weaving