2 Kings 15:35

Only [the altars on] the high places were not removed; the people still sacrificed and burned incense on the high places [rather than in the temple]. He built the upper gate of the house of the Lord.

2 Kings 12:3

Only the high places were not removed; the people were still sacrificing and burning incense [to the Lord] on the high places [rather than at the temple].

2 Chronicles 23:20

He took the captains of hundreds, the nobles, the rulers of the people, and all the people of the land, and brought the king down from the house of the Lord; and they came through the upper gate to the king’s house (palace) and set the king on the throne of the kingdom.

2 Kings 15:4

Only [the altars on] the high places were not removed; the people still sacrificed and burned incense on the high places [instead of worshiping God at the temple].

2 Kings 18:4

He removed the high places [of pagan worship], broke down the images (memorial stones) and cut down the Asherim. He also crushed to pieces the bronze serpent that Moses had made, for until those days the Israelites had burned incense to it; and it was called Nehushtan [a bronze sculpture].

2 Chronicles 27:3-9

He built the upper gate of the house of the Lord, and did extensive building on the wall of Ophel.

2 Chronicles 32:12

Has the same Hezekiah not taken away his [Baal’s] high places and his altars, and commanded Judah and Jerusalem, “You shall worship before [only] one altar and burn incense on it”?

Treasury of Scripture Knowledge

Summary

Howbeit the high places were not removed: the people sacrificed and burned incense still in the high places. He built the higher gate of the house of the LORD.

The higher gate

Bible References

Howbeit

2 Kings 15:4
Only [the altars on] the high places were not removed; the people still sacrificed and burned incense on the high places [instead of worshiping God at the temple].
2 Kings 18:4
He removed the high places [of pagan worship], broke down the images (memorial stones) and cut down the Asherim. He also crushed to pieces the bronze serpent that Moses had made, for until those days the Israelites had burned incense to it; and it was called Nehushtan [a bronze sculpture].
2 Chronicles 32:12
Has the same Hezekiah not taken away his [Baal’s] high places and his altars, and commanded Judah and Jerusalem, “You shall worship before [only] one altar and burn incense on it”?

The higher gate

2 Chronicles 27:3
He built the upper gate of the house of the Lord, and did extensive building on the wall of Ophel.