sentences:  Of this original Fatimid architectural structure, only the lower part of the south side gate called Bab Al-Akhdar remains original in the mosque today.A couple years later, a minaret was added to the original Fatimid gateway by Ayyubid Salih Nagm al-Din in 1237.The minaret has panel carvings of overlapping lines that create patterns called arabesque popular in Islamic Architecture.