Opus Reticulatum wall bound to 17018. Presumed to come later than 17018. Seems to form some kind of room with 17018 and possibly 17002, although it is unclear due to excavation limits
SU 17020: opus reticulatum wall; view toward the west
SU 17020: profile of opus reticulatum wall; view toward the west
SU 17020: west profile of wall