Description
At the famous archaeological site of Birka (Sweden), numerous silk fragments were discovered. Geijer mentions approximately 45 unearthed graves with silk pieces. However, only one of these remained in a condition that allowed the pattern to be reconstructed — one fragment from grave Bj 944. It is possibly part of a hat. The pattern consists of alternating small squares and larger, stepped squares filled with small dots or stars. The fragment included a lace made of silver threads, which was sewn onto the textile. These silver threads played a major role in preserving both the silk and its pattern.

Picture of the original Birka silk: Ola Myrin, Historiska museet
The textile retained traces of blue color, likely evidence of material dyed with indigo. It featured a self-patterned weave of Chinese origin, specifically Han damask.
Additionally, the textile showed traces of gold, possibly indicating a block-printed or painted design on the material.
Grave Bj 944 belonged to a man buried with objects of oriental character, such as kaftan buttons. The grave could be dated around the middle of the 10th century.
Sources:
Geijer, Agnes: The Textile Finds from Birka, Birka III: Die Textilfunde aus den Gräbern, revised by the author Agnes Geijer, Stockholm, in Acta Archaeologica, pp. 209–222. 1980
Geijer, Agnes: Birka III: Die Textilfunde aus den Gräbern. 1938
Vlasatý, Tomáš: Evolution of Scandinavian long knives. Project Forlǫg – Reenactment and science 2020