Before the fire, Nanden South Hall (南殿) was connected to the Seiden main hall seen on the left. To enter the Seiden, we had to enter this hall first (entrance on the right).

The fire also gutted this building beyond repair and had to be torn down along with the Hokuden North Hall (北殿) on the other side of the Seiden.
Photography inside the main buildings wasn't allowed, so sadly I don't have any photos of the interior.