Inner City
The citadel or the acropolis was a kind of huge castle or temple, usually built on a hill that was used as a last resort to hide inside if the city was taken.
The idea was to barricade the narrowly designed entrance and wait for reinforcement while taking refuge inside the tower which would typically be always stocked with food and water for the citizens or at least the nobles to last for weeks.
Such as now, where the Adhanian main army was said to be just a few hundred kilometers from the city, and even if bad road conditions were taken into account, they would be here in at most a month.
Regarding the citadel, Adhan was special because it didn't have a citadel like the other cities per se.
Instead, the royalty had turned s small part of the city into a permanent fortress, for the nobles to stay in and enjoy themselves.