Seal of Muhammad
The Seal of Muhammad (Turkish: Muhammed'in mührü, Arabic: ختم الرسول, romanized: KḪatm ar-Rasūl) is one of the alleged relics of Muhammad kept in the Topkapı Palace by the Ottoman Sultans as part of the Sacred Relics collection.
The most popular design – the muqwaki design used on several Jihadist flags – is the replica of a seal purportedly used by Muhammad on a letter addressed to al-Muqawqis. Scholars have determined the letter to be a literary forgery on palaeographic grounds.