The first Ottoman cover for the holiest site on earth, the blessed Tomb of the Pride of Creation (S) in Medina tul-Munawwara, sent by Sultan Ahmet I in 1603. The Ottomans regarded Ilm al-Jafr, and Ilm al-Huruf as effective sacred sciences as is demonstrated here.
The cap of Uwais al-Qarni (rah), preserved by the Ottoman Caliphs since 1519 in the Topkapi Palace, Istanbul, Turkey.