Golden Gate
Split, Croatia · built 293
The Golden Gate (Croatian: Zlatna vrata, Porta Aurea), or "the Northern Gate", is one of the four principal Roman gates into the stari grad (old town) of Split. Built as the main gate of Diocletian's Palace, it was elaborately decorated to mark its status. Over the course of the Middle Ages, the gate was sealed off and lost its columns and statuary. It was reopened and repaired in modern times and now serves as a tourist attraction.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).