ISB ~ Romans 1 v23

exchanged the glory:Idolatry is the most conspicous error of paganism. It is the sin of worshiping created things in place of the Creator (1:25; Wis 13:10). Gentiles of the biblical period worshiped images of men (Greeks) and animals (Egyptians) (CCC 2112-14).

• Paul alludes to Ps 106:20 as a subtle reminder that Israel, too, has stumbled down the path of idolatry. Although Yahweh strictly forbade Israel to manufacture graven images (Ex 20:4), at its weaker moments the nation venerated figures of men (Ezek 16:17), beasts (Ex 32:4), and reptiles (2 Kings 18:4).