that night at the castle keep
The noctural people of the city, orcs and hobgoblins chief among them, become more lively in full dark. Towards midnight, you make your way to the castle, and find the gates open. There is a small crowd, about a dozen, mostly those taking the time to chuck filth at the dragon you can spot within.
The huge brass, slightly larger than Panantyss, is chained to the ground. His scales are covered in mud, rotten food and much worse. Still, his posture is that of pride and quiet patience. This too shall pass.
You can buy a handful of filth for a copper, if you want to chuck. The hobgoblin guards are allowing people to step just inside the gate to throw their bundles at the beast, further in and with rocks with a bribe.
There are only a few guards at the gate, but more lounging inside. The keep courtyard is a couple hundred feet on a side, with the dragon taking up a good chunk of one side. Note guards are likely inside the inner keep gate.
There is no sign of the empress, but two workers are setting something up on top of the gate.