From ANA:

A large gate dated back to the ancient Greek times was brought to light during archaeological excavations in the region of ancient Pelinna, located along the east bank of Pineios River in Trikala Prefecture, Thessaly in central Greece.

Pelinna is first mentioned by Pindar (522-438 B.C.), the greatest Greek lyric poet, who refers to it as the homeland of Hippocles a winner in the Pythian Games in 498 BC. The games were held at Delphi every four years (the third of each Olympiad) and included musical, literary, and athletic contests held in honor of Apollo, one of the Greek gods. The games were named after Pythia, the priestess of the oracle at Delphi.