I didnât know of Hardanger embroidery and donât recall having seen it. Perhaps I didnât recognize the style or name if I did see it.
But, after your comment, I had to look it up. So, from English Wikipedia.
Hardanger embroidery or "Hardangersøm" is a form of embroidery traditionally worked with white thread on white even-weave linen or cloth, using counted thread and drawn thread work techniques.
It is sometimes called whitework embroidery.
Hardanger embroidery gets its name from the district of Hardanger in western Norway, where it was known simply as hvitsøm (whitework).
German Wikipedia
Sie hat ihren Namen aus der norwegischen Hardangerregion, wo sie hauptsächlich fßr Trachtenblusen und Schßrzen angewandt wurde. Die Technik ist orientalischen Ursprungs.
Google Translation: It takes its name from the Norwegian Hardanger region, where it was primarily used for traditional blouses and aprons. The technique has oriental origins.
Now, if I see it, I'll recognize it! đ