 Nevertheless, at the end of the Napoleonic Wars the Citadel remained unfinished; it was not until the start of the Crimean War in 1853 that work resumed on completing and revetting the ditches.At the same time, some of the existing casemates were adapted to provide barracks accommodation for 500 men.By 1860 the Citadel was entered, via a drawbridge over the ditch, through a gate on the eastern side; a tunnel then led through the rampart into the fort by way of the main guard room.