http://AATesaurus.cultura.gencat.cat/aat/getty_enhttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596fourth millennium BCE http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596 dates by century or millennium BT http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596 4th millennium B.C. UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596 4th millennium BCE UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596 4th-millennium BCE UF http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31328596 millennium, fourth, BCE UF