The Dragon Gate is one of the seven gates that surround the huge walls of King's Landing. It is located at the northern corner of the city's wall near Rhaenys's Hill. The kingsroad enters King's Landing through the Dragon Gate.
During the Dance of the Dragons, a massive riot broke out in the city. The captains of the Old Gate and Dragon Gate managed to sally out and restore some semblance of order to the streets north and east of Rhaenys's Hill.