Josiah makes reforms
Josiah purged Judah of its idols. He also went to the former territory of Israel and broke down altars there.
Key passages
2 Ch 34:3–7

In the eighth year of his reign, while he was still a boy, he began to seek the God of David his ancestor. And in the twelfth year he began to cleanse Judah and Jerusalem of the high places, the Asherahs, the idols, and the images. And he destroyed before him the altars for the Baals, and he …