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

World Heritage Site

10 Crusader Castles

Crac des Chevaliers and Qal'at Salah El-Din - UNESCO World Heritage Centre

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

Krak des Chevaliers – historycomestolife

Reference Book

Crusader Castles in the Holy Land 1192–1302 (Fortress)

Crusader Castles and Modern Histories

CRUSADER CITY - The Complete Pilgrim - Religious Travel Sites