Early in the century, the German archaeologist Gotlieb Schumacher excavated a trench to the west of these buildings, wherein he found additional walls oriented slightly clockwise to other walls. These walls may also be part of the pre-ninth-century structure. Schumacher published a plan of these walls where the difference in orientation, in the area he called the jungeres Gemauer, can easily be seen. The plan is reprinted in the technical version of this paper, cited at the end of this article.