The citadel lies at the end of the rocky spur that reaches out towards the river, on land that is actually lower than the city: this could be possible evidence that it was built after the city. The main entrance to the complex was on the river’s side and was protected by towers on both sides.
Fragmentary structures were found in the (southern) sector near the main entrance, but judging from the scarce remains, an iwan can be recognized here too.
We have more information on the building constructed against the walls on the north opposite corner of the citadel outside the citadel’s walls, next to the stronghold’s main entrance, are the so-called external baths built against the curtain, partly constructed from baked bricks and partly dug into the sloping rock. The complex, in this case, is the typical axial row-type that is often found in a military context and in proximity of fortified walls (of camps, citadels, cities).
The most well-known and significant complex, however, is that of the so-called Internal Baths, in the citadel’s southwest sector. The building was originally a dwelling whose purpose may have changed over time when, in a second construction phase that may have dated back to Alexander Severus, a small thermal block was added to the eastern side of the central porticoed courtyard. This is similar to the small baths in city centres, and is specifically similar to the chronologically and geographically close baths of Dura Europos and to the later baths of Roman Syria (Dipsi Faraj, Brad, Serjilla).
The complex, of which we unfortunately have only a partial knowledge, is distinguished by a peristyle courtyard built almost against the walls, a sort of entrance atrium and other areas along the defences. Its floor plan is that of a private dwelling, and the building may have been the residence of the commander of the troops stationed in Kifrin: the stucco decorations in some of the rooms seem to support this hypothesis.