The moon wasn't visible, just as the sun wasn't during the day. The only difference between night and day here was a mere 10% drop in visibility. Damian wouldn't have even noticed the change if the soldiers guarding his cell hadn't informed him.
At first, Damian wondered why so many men were assigned to guard his cell, but as time passed, high-ranking individuals kept visiting him one after another to inquire and see him. Some wanted to make him their cup bearer, assuming he was just a petty thief caught on the way. Others wanted him as a bed warmer, while some even claimed he was their relative. Very few knew what he had done and why he was here. Those few tried to negotiate with the knights in secret but were politely refused.