This textile was thought to have been made between the 10th-15th century in Egypt. It is made of linen, embroidered in blue cotton or wool. The textile is 22.5 cm by 29.5 cm with a selvage on the left. The textile is in the Ashmolean Museum.
I have charted up the diagonal double running design which is inside the inner squares.
The document is available for download as a pdf.
Let me know how the embroidery goes!