Attenborough visits the impregnable Krak des Chevaliers in Syria to discuss the Crusades. An earthquake destroyed Tripoli, Arqa and Krak des Chevaliers in August 1157. The Krak des Chevaliers in Syria is the best preserved of the concentric crusader castles. Corner composed and produced the soundtrack to the film "Les Chevaliers du Ciel" (2005). The defensive forts of Krac des Chevaliers, Chastel Blanc and al-'Ariymah were damaged. Its only parallel is the castle of Krak des Chevaliers in Syria. After Louis died in 1271 Baibars returned to deal with Krak des Chevaliers. Puisaye wanted a Chouannerie led by nobles and founded the company of the "chevaliers catholiques". At its peak, Krak des Chevaliers housed a garrison of around 2,000. On 20 March, the Syrian Army took control of the Krak des Chevaliers in al-Husn. Other sources add "trent cent Chevaliers" and "quatre cents nobles" to this list. The "Zwinger" of the Krak des Chevaliers was extended in around 1270. It also included Hermel, the plain of Akkar, and "Hosn al-Akrad" (Krak des Chevaliers). Inland, the county's control extended to the Krac des Chevaliers fortress. But it is originally the Toron des chevaliers.