Delphi ( or ; Greek: , ] ) is famous as the ancient sanctuary that grew rich as the seat of Pythia, the oracle consulted about important decisions throughout the ancient classical world.
 Moreover, the Greeks considered Delphi the navel (or centre) of the world, as represented by the stone monument known as the Omphalos of Delphi.
The Latin phrase gradus ad Parnassum means "steps to Parnassus".
 It is sometimes shortened to gradus.
 The name "Parnassus" was used to denote the loftiest part of a mountain range in central Greece, a few miles north of Delphi, of which the two summits, in Classical times, were called "Tithorea" and "Lycoreia".
 In Greek mythology, one of the peaks was sacred to Apollo and the nine Muses, the inspiring deities of the arts, and the other to Dionysus.
 The phrase has often been used to refer to various books of instruction, or guides, in which "gradual" progress in literature, language instruction, music, or the arts in general, is sought.
Delphi Archaeological museum (Modern Greek : "Αρχαιολογικό Μουσείο Δελφών") is one of the principal museums of Greece and one of the most visited.
 It is operated by the Greek Ministry of Culture (Ephorate of Antiquities of Phocis).
 Founded in 1903, it has been rearranged several times and houses the discoveries made at the panhellenic sanctuary of Delphi, which date from the Late Helladic (Mycenean) period to the early Byzantine era.
Boukris or Boucris (Ancient Greek: Βοῦκρις ) was an Aetolian pirate in the 3rd century BC, who raided the Attic countryside and carried off slaves for sale to Crete.
 The incident is known from an inscription where the Athenians honoured Eumaridas, a Cretan from Kydonia, for releasing the captives.
 He may be the same person with Boukris son of Daitas from Naupactus, "proxenos" in Delos.
 Boukris was also a "hieromnemon" of the Aetolians in Delphi in the same century.
The Portico of the Aetolians, known also as the Western Portico, is one of the largest buildings of Delphi, situated outside of the sacred precinct of the sanctuary of Apollo.
The Battle of Thermopylae was fought in 279 BC between invading Gallic armies and a combined army of Greek Aetolians, Boeotians, Athenians, Phocians at Thermopylae.
 The Gauls under Brennus were victorious, and advanced further into the Greek peninsula where they sacked Delphi.
The Sacred Wars can refer to several wars over control of Delphi:
The Echo Stoa is located within the sanctuary of Zeus in Olympia, Greece.
 It is part of an ancient archaeological site excavated and preserved by the German Archaeological Institute at Athens.
 A stoa is a covered walkway or portico, typically colonnaded and open to the public.
 In ancient Greece a stoa could be used for a variety of reasons including the selling and display of goods, and religious or public meetings.
 Aside from Delphi, this sanctuary was the most important one in Greece.
Lingnan culture (Cantonese Jyutping: Ling naam man faa; Traditional Chinese characters: 嶺南文化) refers to the culture of the core Lingnan region - the provinces of Guangdong ("Gwongdung" in Cantonese) and Guangxi ("Gwongsai" in Cantonese) in southern China.
 In a purely geographical sense, this term can include Hakka culture and Teochew culture in the area.
 The term is, however, more typically used to refer to Cantonese culture, which has historically been the dominant cultural force in Gwongdung and the eastern half of Gwongsai.
 Here, this term also includes culture of Hong Kong and culture of Macau, since the people of Hong Kong and Macau are largely Cantonese.
 Lingnan culture is the subject of research at several institutions such as the Centre of Lingnan Culture studies.
 It is often contrasted against the culture of China's northern plains (i.e., Zhongyuan culture).
The Stoa of the Athenians is an ancient portico in the Sanctuary of Apollo in Delphi, Greece, located south of the Apollo Temple.
 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.

Question: Portico of the Aetolians and Delphi refer to what culture?
Answer: Greek