Tiraz can be very useful in dating things to within a year of creation. This tiraz was made in the year 879–80 C.E. in Nishapur, Iran. It is made from a fabric known as mulham, which is silk warp and cotton (or linen) weft. The dimensions are 15.9 cm by 30.5 cm. The tiraz embroidery reads-
“[…] of the Faithful, may God […] of what Ahmad, the brother of the Commander of the Faithful, ordered to be made in the tiraz of Nishapur, year 266 (879-880). Abu Abdallah al-Hamis (al-Tamis)”
Details of the embroidery- The stitches look to be a back stitch or a running stitch but I am happy to be corrected. The textile is in the Metropolitan Museum of Art. There is a very good zoom function.
There is also more information in a previous post called Tiraz.
The Grove encyclopedia of Islamic art and architecture: Vol 2 by Jonathan M. Bloom and Sheila Blair. Via Google Books.
Silk Economics and Cross-Cultural Artistic Interaction: Byzantium, the Muslim World, and the Christian West by David Jacoby. JStor article.
The Silk Road in World History by Xinru Liu. Via Google Books.
Two Islamic Embroideries in Gold on “Mulham” by Dorothy G. Shepherd. JStor article.
Arab dress; a short history: from the dawn of Islam to modern times by Yedida Kalfon Stillman and Norman A. Stillman. Via Google Books.
Tiraz: Textiles and Dress with Inscriptions in Central and Southwest Asia by Margaret Anne Deppe. Via Google Docs.