Original sentence: It is situated on the northern end of the island of São Francisco do Sul at the entrance to the Bay of Babitonga.São Francisco do Sul is the third-oldest post-Columbian city in Brazil
Edited sentence: It is  situated on the northern end of the island of São Francisco do Sul at the entrance to the Bay of Babitonga.It was definitely founded as a village by the Portuguese in 1658.São Francisco do Sul is one of oldest cities of Santa Catharina , the Spanish firstly populated the area in 1555