Floor surface. Probably related to a large rectangular or apsidal hut covering the S. part of the courtyard and running out of the 2017 excavation area. It is not clear if part/any/the entire surface was roofed or not since there are only sporadic traces of postholes/wall trenches.
Compact gray surface in S half of courtyard along with various cuts
From E
From E.
From N
From N. Zoomed in
From NW