simple systemhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31379395enGetty Institute2026-03-30 20:42:21http://AATesaurus.cultura.gencat.cat/aat/getty_enTesaurus d'Art i Arquitecturatext/html German system Meyer system old system ordinary system system, German system, Meyer system, old system, ordinary system, simple