For many reasons, I've had Medieval embroidery on the brain lately. Several years ago, I had the good fortune to be invited to a symposium put on by a Society for Creative Anachronism (SCA) group. They taught four embroidery classes over two days, and it was an incredibly valuable experience.
One of the classes was Opus Anglicanum (translation: English Work) which I don't think I'd even heard of at the time! We worked a traditional Medieval character in silk and gold threads.
Autumn 2022: Google ended its email subscription service last year. I believe I've found a replacement, but haven't had time to test it. Given current demands on my time. I won't be posting again until I have a replacement. (I have been stitching a little bit and look forward to sharing my newest projects when the subscription service is active again.)