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.
... Cao, (died c. 1486), explored the African west coast
Jacques Cartier, (1491-1557), discovered the St. Lawrence River and sailed up it to Montreal; failed in ...