Krak des Chevaliers is a medieval fortress located in the Homs Governorate of Syria, approximately 40 km west of Homs and 180 km north of Damascus. It was built by the Hospitaller Order of Saint John of Jerusalem, also known as the Knights Hospitaller, in the 12th century AD.

The castle is situated on a hilltop and is surrounded by a deep moat, making it difficult for attackers to approach. It was strategically positioned along the route between the Mediterranean coast and the interior of Syria, and served as a key stronghold for the Crusaders during their campaigns in the Holy Land.

The castle is a remarkable example of medieval military architecture, with its massive walls, towers, and moat. It has undergone numerous renovations and additions over the centuries, including the addition of a chapel and several other buildings within its walls.

The castle was occupied by various powers over the centuries, including the Mamluks, the Ottomans, and the French during their mandate over Syria. Today, it is a UNESCO World Heritage Site and a popular tourist attraction, visited by thousands of people every year.