'Gateway' in the Bible

When Abner returned to Hebron, Joab brought him aside within the gateway to talk to him alone and then stabbed him in the abdomen. So he died for shedding the blood of Joab's brother Asahel.

Meanwhile, David was sitting between the inner and outer gates of the city. The watchman was up on the roof of the gateway near the walls, looking around, and there was a man running by himself!

So the king got up and took his seat in the gateway. When the army was informed, "The king is sitting in the gateway!" they all gathered together in his presence.