The Great Mosque in Aleppo (جامع حلب الكبير) is built on the grounds of a 6th-century cathedral of St. Helena. The mosque was founded in the early 8th century. Apart from a Seljuk minaret from 1095 that was still standing the mosque was destroyed by a fire in 1169. The minaret has been destroyed in April 2013. At some time it was a beautiful building because stonework from a Cathedral of Cyrrhus was used to ornament it. That stonework was taken away to the Baghdad Anbar Mosque. The current mosque is impressive for its size, and has some fine ornamentation, but overall looks too new and, if I may say so, plain. It is also called Al-Zakarye, because the head of Zacharias, father of John the Baptist, is said to be buried here in a room to the left of the minbar. The many visitors to the mosque make it a pleasant place, I show a lot of kids who wanted to be in the picture. Pictures were taken on two occasions, hence differences in light conditions.
Aleppo itself has a gallery of its own.

I received a link in an open-sourced project to a map indicating the damage in the city.