For more than four years now the battle of Aleppo has been responsible for the destruction of Syria's biggest city. An agreed ceasefire was put in place to allows those still living in the war torn areas of the city to escape and travel to rebel-held areas in Idlib province, however that recently fell apart.
Since the war began in 2012 more than 30,000 people are have thought to have been killed and another 20,000 displaced from the city of Aleppo. In turn some of the cities most famous and beautiful monuments and architecture have been destroyed to the point of no return, including the Great Mosque which was built in the 8th century. Here are 19 before and after photos that show the devastating effects it's had on the city.