2 Kings 15:35

Only, the high places, took they not away, still were the people offering sacrifice and burning incense in the high places, - he, built the upper gate of the house of Yahweh.

2 Kings 12:3

save only, that, the high places, took they not away, - still were the people sacrificing and burning incense in the high places.

2 Chronicles 23:20

Then took he the captains of hundreds - and the nobles - and the rulers over the people - and all the people of the land, and brought down the king out of the house of Yahweh, and they entered, through the midst of the upper gate, into the house of the king, - and they seated the king, upon the throne of the kingdom.

2 Kings 18:4

He, removed the high places, and brake in pieces the pillars, and cut down the Sacred Stem, - and beat in pieces the serpent of bronze that, Moses, had made, because, until those days, had the sons of Israel been burning incense thereunto, so he called it Nehushtan.

2 Chronicles 27:3-9

He, built the upper gate of the house of Yahweh,-and, on the wall of Ophel, built he extensively.

2 Chronicles 32:12

Is it not, the same Hezekiah, who hath removed his high places, and his altars, - and hath given word to Judah and Jerusalem, saying, Before one altar, shall ye bow yourselves down, and, thereupon, shall ye burn incense?

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 18:4
He, removed the high places, and brake in pieces the pillars, and cut down the Sacred Stem, - and beat in pieces the serpent of bronze that, Moses, had made, because, until those days, had the sons of Israel been burning incense thereunto, so he called it Nehushtan.
2 Chronicles 32:12
Is it not, the same Hezekiah, who hath removed his high places, and his altars, - and hath given word to Judah and Jerusalem, saying, Before one altar, shall ye bow yourselves down, and, thereupon, shall ye burn incense?

The higher gate

2 Chronicles 27:3
He, built the upper gate of the house of Yahweh,-and, on the wall of Ophel, built he extensively.