Qalʿat Jaʿbar, vaulted loophole

Qalʿat Jaʿbar, vaulted loophole

A general view of the remains of Shayzar Castle

A general view of the remains of Shayzar Castle

A side from archaeological city of Dura Europos (Qalʿat as-Salihiyya)

A side from archaeological city of Dura Europos (Qalʿat as-Salihiyya)

The gate of south-western side, Dura Europos (Qalʿat as-Salihiyya)

The gate of south-western side, Dura Europos (Qalʿat as-Salihiyya)

Palmyra, Colonnaded axis and Qalʿat Ibn Mʿan in the back

Palmyra, Colonnaded axis and Qalʿat Ibn Mʿan in the back

Exterior view of Krak des chevaliers (Qalʿat al-Husn)

Exterior view of Krak des chevaliers (Qalʿat al-Husn)

Jurn Kabir, a typical old house of the Euphrates valley near Qalʿat Najm with a large log (willow) transverse to the longitudinal axis.

Jurn Kabir, a typical old house of the Euphrates valley near Qalʿat Najm with a large log (willow) transverse to the longitudinal axis.

Hama, al-Mudiq castle, A side of al-Mudiq castle shows some of its towers

Hama, al-Mudiq castle, A side of al-Mudiq castle shows some of its towers

A side of al-Mudiq castle in Hama shows some of its towers

A side of al-Mudiq castle in Hama shows some of its towers

Hama, General view of al-Madiq castle from the southern side

Hama, General view of al-Madiq castle from the southern side

Krak des chevaliers (Qalʿat al-Husn), Gothic vaults

Krak des chevaliers (Qalʿat al-Husn), Gothic vaults

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, Arabic inscription

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, Arabic inscription

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, stone arch

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, stone arch

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, twin crusader castles, stone arch

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, twin crusader castles, stone arch

Tartus, Qalʿat al-Marqab, Crusader castle, a courtyard in the castle.

Tartus, Qalʿat al-Marqab, Crusader castle, a courtyard in the castle.

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a general view of the the valley around the twin castle

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a general view of the the valley around the twin castle

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, stone arches

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, stone arches

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, Arabic inscription

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, Arabic inscription

Tartus, Qalʿat al-Marqab, Crusader castle, general view from the Castle.

Tartus, Qalʿat al-Marqab, Crusader castle, general view from the Castle.

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, cave

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, cave

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, general view of the site

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a twin crusader castle, general view of the site

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a general view of bridge between the two castles

Jisr ash-Shughur, Qalʿat ash-Shugr wa-Bakas, a general view of bridge between the two castles

Jisr ash-Shughur, Qalʿat Shugr wa Bekas from the inside.

Jisr ash-Shughur, Qalʿat Shugr wa Bekas from the inside.

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

Euphrates valley south of Qalʿat Najm as it looked before the flooding of lake Tishrin

Euphrates valley south of Qalʿat Najm as it looked before the flooding of lake Tishrin

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

View on the Euphrates River from the site of Dura Europos (Qalʿat as-Salihiyya)

View on the Euphrates River from the site of Dura Europos (Qalʿat as-Salihiyya)

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC

The northern entrance of the historical city of Dura Europos (Qalʿat as-Salihiyya), end of 4th century BC