The Arch of Marcus Aurelius, built in 163 AD, is the most prominent ancient monument in Tripoli and one of the finest Roman arches in North Africa. It stands in the old medina at what was once the crossroads of the main streets of the Roman city of Oea. The arch is four-faced — spanning both directions of the intersection — with carved reliefs on the interior showing the imperial cult, sacrificial scenes, and figures of deities.
The white stone catches the afternoon light dramatically. The arch survived intact through Byzantine, Arab, and Ottoman rule largely because it was incorporated into the city's walls and later into private buildings — which also meant it was encased and forgotten until Italian archaeologists excavated it in the early 20th century. The surrounding area has been cleared to form a small square, giving a clear view from all sides.