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View of the east end of the Macellum of the Forum of Pompeii (see below for a description). Here on the east (left) side of the Macellum there were three rooms—two of the three are visible here. The central room (on the left) held statues of members of the Imperial Family—maybe those of Octavia (sister of Augustus) and Marcellus (son of Octavia)—this room is just left of the center of the image. The room on the right has three counters and was a meat market.
Part of the tholos is visible in the lower right of the image. The function of the tholos could vary from macellum to macellum, but often times they contained water holdings tanks where fresh fish could be kept for sale—fishscales and fishbones were found under this tholos.
This Macellum measures 120 x 90 feet and was surrounded by shops. A Macellum is a large market area where produce (fruits and vegetables) and fish were sold. They are typically surrounded by shops and often will have a round (tholos) structure in the center.