Eternal Golden Castle is not only Taiwan's first modern western fort, also first with "Armstrong cannon" of the fort, the fort can be said to be an epoch-making milestone in the history of Taiwan. Create a fort, due to "Mudan incident" caused by the Japanese invasion of Taiwan. Shen Pao-chen Qing imperial envoy was sent to Taiwan to raise defense and handle negotiations, Shen's then petitioned to build solid sea fort, guard Tainan. Because the fort is located sandbar location, materials and shipping are not easy to obtain, at the time had a lot of rumors have been ruinous for borrowed Zeelandia (ie Fort Zeelandia) as the founding of the city wall material. Completion of the entire fort Guangxu years, though, and play a role in the incident, and then in Guangxu 10 years and 21 years of Sino-French, Sino-Japanese War, had exhibitions TRIUMPH effective deterrence enemy invasion. Wide majority of mainland fort, originally Caobing drill where, originally built with a central pond depth of about five or six feet, to cushion the landing lethal enemy artillery, in order to avoid endangering around the barracks and soldiers.