Cairo, Egypt, in its history[?] has had a significant number of fortified gates protecting both inner and outer city. Apart from the purpose of defense they were also used for differentiation of the varied social and economic classes. Often the gates were heavily decorated as artistic pieces.
... there are 53,364 people, 21,348 households, and 13,363 families residing in the city. The population density is 481.1/km² (1,246.0/mi²). There are 23,525 ...