Jamieson, Fausset and Brown on Isaiah 3:26

26. gates--The place of concourse personified is represented mourning for the loss of those multitudes which once frequented it.

desolate ... sit upon ... ground--the very figure under which Judea was represented on medals after the destruction by Titus: a female sitting under a palm tree in a posture of grief; the motto, Judæa capta (Job 2:13; La 2:10, where, as here primarily, the destruction by Nebuchadnezzar is alluded to).