'How-To' instructions for nearly all embroidery stitches- Amazing site with pictures & details to explain.
Bayeux Stitch and round shapes… | Racaire's Embroidery & Needlework…
Braided chain stitch--will be a cool detail on something... This entire blog is AMAZING, full of easy-to-follow instructions on just about any stitch you can think of.
Instructions for doing opus anglicum, the English embroidery often used to decorate altar cloths and vestments. I understand it went into decline after the middle of the 14th century because so many of its practitioners died of the Black Plague.
Hand sewn linen Viking tunic with embroidery from Kievan Rus - Othala Craft