Question: The Macau Peninsula has a gate built on the northern isthmus, for how long did it serve as a border?
Sentence (from "Portas do Cerco"): 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.
Relevant evidence: No