Found on an online auction.
Each
city gate and each lookout tower has its formal name inscribed next to it. Clockwise from the top we see Martial Power Tower 振武台, Multi-Warrior Tower 万军台, Pavilion of the Goddess of Mercy 观音阁, Jade Belt Gate 玉带门 (Little East Gate), Ancestry Gate 朝宗门 (Big East Gate), Sun-Facing Gate 朝阳门 (Little South Gate), Dragon-Leaping Gate 跨龙门 (Big South Gate), Ceremonial Phoenix Gate 仪凤门 (later Old West Gate), Dajing Pavilion 大境阁, Sea Feasting Gate 宴海门 (later Old North Gate).
Among these structures, only
Dajing Pavilion 大境阁 survives to this day, in a heavily reconstructed form.
Mapping Old Shanghai.