The Fortress of Saladin, State of War: Syria's Crusader Castles and Medieval Fortresses

TIME looks at a number of Syria's most famous medieval fortresses, some of which are nearly a millennium old.

Syrian castle among quake-hit ancient sites at risk

Krak des Chevalier - All You Need to Know BEFORE You Go (with Photos)

Real Crusades History +: True Tales of the Knights Templar 3: The Battle of Montgisard 1177

Citadel of Aleppo, State of War: Syria's Crusader Castles and Medieval Fortresses

10 of the Best Crusader Castles, Historical Landmarks

Krak Des Chevaliers: A Crusader Castle in Medieval Syria – Brewminate: A Bold Blend of News and Ideas

Crusaders Castles - Historic European Castles

Syria's Fortress of Saladin among quake-hit ancient sites seen at risk

Castles of the Crusaders - Saone (Qalaat Salah ad-Din)

10 Crusader Castles

Citadel of Saladin … one of the landmarks in the Syrian coast – Syrian Arab News Agency

Saladin Citadel of Cairo - Medieval Islamic fortification

The Fall of the Knights Templar: The Siege of Acre, 1291 - Aspects of History

The Fortress of Saladin, State of War: Syria's Crusader Castles and Medieval Fortresses