Albert Barnes Commentary 2 Kings 11:19

"And he took the captains over hundreds, and the Carites, and the guard, and all the people of the land; and they brought down the king from the house of Jehovah, and came by the way of the gate of the guard unto the king`s house. And he sat on the throne of the kings." — 2 Kings 11:19 (ASV)

They conducted the king down from the temple hill, across the valley of the Tyropoeum, and up the opposite hill to the royal palace, entering it not by the horse-gate (2 Kings 11:16), where Athaliah had just been slain, but by the gate of the guard (2 Kings 11:6), which was probably the main gate of the palace on the eastern side (see 2 Chronicles 23:20).