In which city and with what frequency were the games in honor of the god Apollo held?

In the ancient city of Delphi, where the Delphic Oracle was located, the Pythian Games were held every four years in honor of the golden-haired Apollo, who defeated the evil Python. These games began to be held from the beginning of the 6th century BC. e. In addition to sports competitions, they also held competitions in art and philosophy. In art competitions, hymns to Apollo were sung, flutes and citharas were played. It was here that seven philosophers became famous. These games ceased in the 4th century with the rest of the Panhellenic contests as part of the pagan culture in Christian society.