The Citadel of Aleppo is one of the most extraordinary medieval fortresses in the world, rising 50 metres above the city on a great stone-faced mound that has been fortified continuously for at least four thousand years. The current structure is largely the work of the Ayyubid sultan Ghazi in the early 13th century, though it incorporates Roman, Byzantine, and earlier elements. The glacis — the massive sloping stone apron that surrounds the mound — is a feat of medieval military engineering that protected the Citadel through sieges by the Crusaders and the Mongols.
The Citadel survived the Syrian civil war largely intact, its walls too solid to succumb to the fighting around it. The interior contains a palace, two mosques, baths, and a theatre — all dating from the Mamluk period. Access has been restored since 2024 and the main structures can be visited. The view from the top over the old city — or what remains of it — is sobering and extraordinary.