I’ve been reading about Armenian embroidery! The examples on this particular site are all based on complex interlacings of variations on the herringbone stitch. This results in somewhat stylized geometric designs, like the embroidered cross in the photo to the left. The cross is an Armenian cross (notice the eight points), and the eight-pointed star is also an Armenian symbol. The site says this relates to the eight points of the compass. The pillowcase below is from their gallery of Armenian work.
I don’t know if I want to do an entire embroidery in this stitch, but I absolutely love these borders.
The site also has detailed instructions and diagrams for the embroidery. Two basic stitches are introduced, then on a separate advanced page they provide sixteen motifs and borders with diagrams to explain the steps. The diagram to the left is the final step of one of the motifs on the advanced page. Below is an excerpt of one of the diagrams from the basic tutorial: