Souk Ghzal mosque
Souk el-Ghazal is definitely worth a look on your way to the Bey’s palace.
Built in 1730 by Abbas ben Alloul Djelloul, a Moroccan, on the orders of the then Bey of Constantine, Hussein Bou Kemia, it reuses Roman-period granite columns. After the French defeated the Bey and took control of the city, the mosque was enlarged, realigned and con- verted into the cathedral, Notre-Dame-des- Sept-Douleurs in 1838. It was turned back into a mosque after independence.