The Macau Peninsula has a gate built on the northern isthmus, for how long did it serve as a border?
Portas do Cerco The Portas do Cerco is an area in Nossa Senhora de Fátima, Macau, China. Located on the northern tip of the Macau Peninsula, it is known by its border gate separating Macau from mainland China. The gate was built in 1849 to replace a crumbling wall that was erected in 1573 to mark the border of the Portuguese colony. It was the site of the Passaleão Incident, a clash between the Qing dynasty and the Kingdom of Portugal in 1849 over the death of Macau's governor Ferreira do Amaral. Led by Colonel Mesquita, Portugal won the small battle which led to the extension of Macau's border northwards. At the limit of said expansion, the Portas do Cerco was built with the inscription "A pátria honrai, que a pátria vos contempla" (Portuguese for "Honor your motherland, for your motherland looks over you") on the façade on its inner arch in 1849. For the next 155 years, the gate served as the border between Macau and China.
Great Clearance The Great Clearance, also translated as the Great Evacuation or Great Frontier Shift, refers to two edicts by the Kangxi Emperor of Qing (1644–1912), and his regent Oboi, in 1661 and 1662. It required the evacuation of the coastal areas of Guangdong in order to fight the Taiwan-based anti-Qing loyalist movement of the erstwhile Ming dynasty (1368–1644). Other provinces in southern China, including Zhejiang, Jiangsu and Fujian, as well as Shandong in the north, were also affected to varying degrees. The ban on human settlement of those coastal areas was lifted in 1669, and some residents were allowed to return.