Now, air strikes by Russian and Syrian forces are continuing to ravage the city, while fighting between rebel forces and government troops takes a heavy toll. Images from before and during the war show some of the cultural heritage Aleppo has lost.
Aleppo, A Historic City In Ruins
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Saint Elias Church
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The Carlton Citadel Hotel was destroyed in a bomb blast in 2014.
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The view along a street leading up to Aleppo's 13th century citadel