| Sicao Fortress | |
| Native Name: | 四草砲台 |
| Location: | Annan, Tainan, Taiwan |
| Type: | fort |
| Coordinates: | 23.019°N 120.1352°W |
| Pushpin Map: | Tainan |
| Pushpin Mapsize: | 250px |
| Builder: | Yao Ying |
| Battles: | First Opium War |
The Sicao Fortress is a former fort in Annan District, Tainan, Taiwan.
The fortress was built during the First Opium War in 1840 during the Qing Dynasty rule of Taiwan by Commander Yao Ying to prevent British Empire troops from invading Taiwan.[1] The fort was initially constructed as a temporary gun platform. However, later on an outer wall made of solid granite was constructed and an inner wall made of pebbles was also added.[2]
The fortress has 13 around gun holes.[2]