A strange funeral ceremony, why did ancient Greece put coins in the eyes of the deceased?

That's the fare paid by the deceased to the boatman Caron when he crossed the Agron River in the underworld.

According to Greek legend, there is more than one Styx, and Kalon is just one of the rivers called the Cologne River, and all souls who go to trial must pass through it. The river is black, and only the ferry in Kalong can take people across. Carons will charge for this-this is a well-known Greek myth, so when they die, they will put money into the mouth (or eyes) of the deceased.

Extended data

The three ancient Styx rivers-Styx, Billiton River and Kexit River-now belong to the underworld of Islam, Judaism and Christianity. Three Styx separate the upper and lower levels of the former Hazare Kingdom, namely: Valley of Fire, Hell and Muslim Hell. The boundary between the three religions and the ghost country also happens to meet in the underground of the original Hazare country.

A ghost kingdom is Satan's fiery kingdom, with nine levels of hell of Christianity, the throne of the devil Liu Zifei and the flag of Hades; Another ghost kingdom is cold and suffering, and China has an Islamic hell; The third ghost kingdom is located in Guevara district on the left side of the temple, where Jewish evil gods, poor gods and hungry gods sit, that is, the valley burned by fire under Amasti's rule.

The three levels of hell have their own portals, and the boundaries are turned over by iron plows, and no one can cross them.

Refer to Baidu Encyclopedia-Styx