All the people gathered themselves together as one man into the square that was in front of the Water Gate (Nehemiah 8:1)
Excavations at a variety of ancient cities have demonstrated that it was common for city gates to have plazas associated with them. These plazas or open squares provided a place where markets could be set up or public assemblies held. This photo shows the large, paved plaza just outside the Iron Age gate at Tel Dan. The threshold of the actual gate can be seen between the two piers at the gate entrance.