In July 2015, a bomb was reportedly set off in a tunnel under one of the outer walls causing further damage to the citadel. During the conflict, the Syrian Army used the Citadel as a military base, and according to the opposition fighters, with the walls acting as cover while shelling surrounding areas and ancient arrow slits in walls being used by snipers to target rebels. As a result of this contemporary usage, the Citadel has received significant damage. There are many structural remains inside the citadel. Notable sites include:  The enormous stone bridge constructed by Sultan Ghazi over the moat led to an imposing bent entrance complex. Would-be assailants to the castle would have to take over six turns up a vaulted entrance ramp, over which were machicolations for pouring hot liquids on attackers from the mezzanine above. Secret passageways wind through the complex, and the main passages are decorated with figurative reliefs. The Ayyubid block is topped by the Mamluk "Throne Hall", a hall where Mamluk sultans entertained large audiences and held official functions. Ghazi's "palace of glory" burned down on his wedding night, but it was later rebuilt and today stands as one of the most important and impressive monuments in the citadel crown. The Ayyubids were not the first to build a palace on the citadel. Today, numerous architectural details remain from the Ayyubid period, including an entrance portal with muqarnas, or honeycomb vaulting, and a courtyard on the four-iwan system, with tiling. Laid out in traditional medieval Islamic style, the palace hammam has three sections. The first was used for dressing, undressing, and resting. The second was an unheated but warmer room, and this was followed by a hot room, and a steam room equipped with alcoves. Hot and cold water was piped through to the hammam with earthenware pipes. The construction in the citadel was not confined to above-ground. Several wells penetrate down to 125 m (410 ft) below the surface of the crown. Underground passageways connect to the advance towers and possibly under the moat to the city.