stylistic:tone, structural:expansion, structural:summarization
Cult

The ancient Greeks celebrated the festival of the Heracleia, which commemorated the death of Heracles, on the second day of the month of Metageitnion (which would fall in late July or early August). What is believed to be an Egyptian Temple of Heracles in the Bahariya Oasis dates to 21 BCE. A reassessment of Ptolemy 's descriptions of the island of Malta attempted to link the site at Ras ir-Raħeb with a temple to Heracles, but the arguments are not conclusive. Several ancient cities were named Heraclea in his honor. A very small island close to the island of Lemnos was called Neai (Νέαι), from νέω, which means "I dive/swim", because Heracles swam there. According to the Greek legends, the Herculaneum in Italy was founded by him.

Several poleis provided two separate sanctuaries for Heracles, one recognizing him as a god, the other only as a hero. Sacrifice was made to him as a hero and as a god within the same festival. This ambiguity helped create the Heracles cult especially when historians (e.g. Herodotus) and artists encouraged worship such as the painters during the time of the Peisistratos, who often presented Heracles entering Olympus in their works.

Some sources explained that the cult of Heracles persisted because of the hero's ascent to heaven and his suffering, which became the basis for festivals, ritual, rites, and the organization of mysteries. There is the observation, for example, that sufferings (pathea) gave rise to the rituals of grief and mourning, which came before the joy in the mysteries in the sequence of cult rituals. Also, like the case of Apollo, the cult of Heracles had been sustained through the years by absorbing local cult figures such as those who share the same nature. He was also constantly invoked as a patron for men, especially the young ones. For example, he was considered the ideal in warfare so he presided over gymnasiums and the ephebes or those men undergoing military training.

There were ancient towns and cities that also adopted Heracles as a patron deity, contributing to the spread of his cult. There was the case of the royal house of Macedonia, which claimed lineal descent from the hero, primarily for purposes of divine protection and legitimator of actions.

The earliest evidence that shows the worship of Heracles in popular cult was in 6th century BCE (121–122 and 160–165) via an ancient inscription from Phaleron. After the 4th century BCE, Heracles became identified with the Phoenician God Melqart

Oitaeans worshiped Heracles and called him Cornopion (Κορνοπίων) because he helped them get rid of locusts (which they called cornopes), while the citizens of Erythrae at Mima called him Ipoctonus (ἰποκτόνος) because he destroyed the vine-eating ips (ἀμπελοφάγων ἰπῶν), a kind of cynips wasp, there.