Self-guided Sightseeing Tour #1 in Municipal Unit of Delphi, Greece

Delphi, in legend previously called Pytho (Πυθώ), was an ancient sacred precinct and the seat of Pythia, the major oracle who was consulted about important decisions throughout the ancient classical world. The ancient Greeks considered the centre of the world to be in Delphi, marked by the stone monument known as the Omphalos of Delphi (navel).

Wikipedia: Delphi (EN)

The Temple of Apollo at Delphi was an ancient Greek temple at Delphi, Phocis

Wikipedia: Ναός του Απόλλωνα στους Δελφούς (EL)

The Stoa of the Athenians is an ancient portico in the Delphic Sanctuary, Greece, located south of the Temple of Apollo. The southern side of the polygonal wall of the platform forms the north wall of the stoa. It was constructed c. 478 BC-470 BC during the early Classical period. The one-aisled stoa with Ionic colonnade opens toward the southeast. It was dedicated by the Athenians after the Persian Wars.

Wikipedia: Stoa of the Athenians (EN)

The Athenian Treasury at Delphi was constructed by the Athenians to house dedications and votive offerings made by their city and citizens to the sanctuary of Apollo. The entire treasury including its sculptural decoration is built of Parian marble. The date of construction is disputed, and scholarly opinions range from 510 to 480 BCE. It is located directly below the Temple of Apollo along the Sacred Way for all visitors to view the Athenian treasury on the way up to the sanctuary.

Wikipedia: Athenian Treasury (EN)

The Siphnian Treasury was a building at the Ancient Greek cult centre of Delphi, erected to host the offerings of the polis, or city-state, of Siphnos. It was one of a number of treasuries lining the "Sacred Way", the processional route through the Sanctuary of Apollo, erected to win the favor of the gods and increase the prestige of the donor polis. It was one of the earlier surviving buildings of this type, and its date remains a matter for debate, with the most plausible date being around 525 BC. Until recently it was often confused or conflated with the neighbouring Cnidian Treasury, a similar but less elaborate building, as the remains of the two had become mixed together and earlier theoretical reconstructions used parts of both.

Wikipedia: Siphnian Treasury (EN)