Relics of Muhammad
Traditionally, Islam has had a rich history of the veneration of relics, especially of those attributed to the Islamic prophet Muhammad. There exists historical evidence that some of the earliest Muslims practiced the veneration of relics, and the practice continued to remain popular in many parts of the Sunni Islamic world until the eighteenth-century, when the reform movements of Salafism and Wahhabism began to staunchly condemn such practices due to their linking it with the sin of "shirk" (idolatry). As a result of the influence of these perspectives, some contemporary Muslims influenced by these ideologies have rejected the traditional practice of relic-veneration altogether. The most genuine prophetic relics are believed to be those housed in Istanbul's Topkapı Palace, in a section known as "Hirkai Serif Odasi" (Chamber of the Holy Mantle).
Ioannina Castle
The main surviving part of Ali's palace is the so-called "Treasury" (Θησαυροφυλάκιο) to the north, a square building of unidentified use. A domed space adjacent to it was later converted into the small church of the Holy Unmercenaries (Άγιοι Ανάργυροι). The Treasury was restored in 1989–90 and houses an exhibition on the history and methods of silversmithing in Ioannina and its wider area, for which the region was famous in Ottoman times. Other surviving or excavated structures are the kitchens, dating to the early 19th century, located in the northwestern part of the citadel, which now serve as a refectory; the gunpowder store to the northeast of the Fethiye Mosque, which today serves as an educational space, with a ruined building of unknown purpose between it and the kitchens, as well as the ruined base of another large Byzantine-era circular tower; a large two-storey building northeast of the Treasury, possibly a barracks or an unidentified part of the palace, which survives only in half its original length, and now serves as a cultural and exhibition space; and a small bath complex to the north.