Octagonal Circle Tainan, where the ancient time is hidden in the alleys of the city and the layers of time have created a depth, has old toponyms passed on to generations and old temples sitting in the history, showing the miens of Tainan in different years. The city is constructing upon “a road crossed with times”, which is a once-prosperous-waterway with five watercourses. The “Taiwanese Venice” during the Qing dynasty had its watercourses lay on the western side of the prefecture like five fingers that merged the ocean and the land. As the watercourses were slowly silted up 100 years ago, they were included in the urban planning during the Japanese domination. The watercourses can therefore no longer be seen and are redeveloped into residential area. However, two of them have become alleys! The “union territory” system of Tainan is another extinguishing history. Having temples as the main part, it has outlined invisible borders after borders as the fundamental civil defense structure. Among them, the “San-shye Territory” was formed by Wind God Temple, Nan-Sha Temple, Jin-Hua Temple and Yao-Wang Temple, totally four temples that guard the areas of Nanshi Port and Nanhe Port. As the matter of fact, these two waterways have crossed