Black Gate

The Black Gate separates the Old City from the New. More significantly, it separates those who have wealth and power from those who do not. Consequently it is manned by an elite patrol, with a standard patrol always stationed in the gate house.
The Black Gate is closed two hours after sunset and remains closed until an hour before dawn. When the gate is opened, the roster is diligently maintained, and the guards keep a sharp lookout for fugitives. The Thieves' Guild is also said to maintain a constant surveillance of the Black Gate, from a discreet location just inside the Thieves' Quarter.