Though it's described as a tapestry, it is actually linen cloth embroidered with wool thread. In another room of the museum, a permanent exhibition describes how it was made and gives an overview ...
There is a narrow margin at all four sides and at lower left a typed label reads, “Anni Albers II.1926 tapestry silk, 48” wide 3ply weave”. At lower right there is a signature in graphite, “A. Albers” ...