General view of Qalʿat Salah ad-Din

General view of Qalʿat Salah ad-Din

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

The gate of south-western side, 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

Excavation works, Dura Europos (Qalʿat as-Salihiyya)

Excavation works, Dura Europos (Qalʿat as-Salihiyya)

Excavation works, Dura Europos (Qalʿat as-Salihiyya)

Excavation works, Dura Europos (Qalʿat as-Salihiyya)

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

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

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

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

Palmyra, Colonnaded axis and Qalʿat Ibn Mʿan in the back

Palmyra, Colonnaded axis and Qalʿat Ibn Mʿan in the back

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

A side from archaeological city 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

Qalʿat al-Mudiq seen from the ruins of Afamiya

Qalʿat al-Mudiq seen from the ruins of Afamiya

View from afar, Qalʿat Salah ad-Din (castle)

View from afar, Qalʿat Salah ad-Din (castle)

The prayer niche and the pulpit in the middle of the south wall in the prayer hall of the Great Umayyad Mosque of Aleppo

The prayer niche and the pulpit in the middle of the south wall in the prayer hall of the Great Umayyad Mosque of Aleppo

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.

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

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)

Dura Europos (Qalʿat as-Salihiyya), Roman amphitheater

Dura Europos (Qalʿat as-Salihiyya), Roman amphitheater

Jaʿbar castle, southern side of the castle

Jaʿbar castle, southern side of the castle

Machicolations on the wall of Damascus Citadel

Machicolations on the wall of Damascus Citadel

at-Tabqa, Jaʿbar Castle, polygonal tower.

at-Tabqa, Jaʿbar Castle, polygonal tower.

at-Tabqa, Jaʿbar Castle, Towers of western walls

at-Tabqa, Jaʿbar Castle, Towers of western walls

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

At-Tabqa , Minaret of the Mosque at Jaʿbar Castle.

At-Tabqa , Minaret of the Mosque at Jaʿbar Castle.

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

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