What is the oldest city in the USA?

Can you enlighten me on the matter of the oldest city in the United States? I'm particularly curious to know which city holds this prestigious title and what historical significance it carries. I understand that there may be various definitions of 'oldest' when it comes to cities, but I'm looking for the one that's generally considered the first to be established or permanently inhabited. Can you provide me with some insight into its founding, any notable landmarks or events that have occurred there, and its impact on the nation's history?