Thank you @marcybetancour.

After 330 AD, the time of Christianity, the name of the city changed from Apollonia to Sozopolis; such a change was associated with the names of many other cities bearing the name of Apollo, but the new name fulfilled one of Apollo's functions as a savior. - This is the version that I know for the name

Yes, there is any kind of restaurants that offre different type of food. Maybe and greek.