Olives touched nearly every part of daily life in ancient Greece. They were food, fuel, medicine, soap, currency, and sacred symbol all at once. No other crop came close to matching the olive’s reach across Greek society, which is why the Greeks built laws, myths, and entire economies around a single tree.
The Foundation of the Greek Diet
Olive oil was the primary fat source in the ancient Greek diet, and it showed up at virtually every meal. A 1953 study of traditional Cretan eating habits, which had changed remarkably little since antiquity, noted that food seemed “literally to be swimming in oil.” Bread, legumes, wild greens, and cheese were the daily staples, and olive oil bound them all together. It replaced butter, which was scarce in the Mediterranean climate, and served as the default cooking fat for everything from fried fish to grain porridge.
Olives themselves were also eaten whole after curing. Families stored them in small ceramic jars called pitharakia, packed in salt for long-term preservation. Olive oil went into much larger vessels called pithoi, massive storage jars holding 150 to 300 liters. The pithos design was so effective it remained essentially unchanged for 4,000 years. Having a well-stocked supply of oil and cured olives was a basic measure of household security.
An Economy Built on Oil
Olive oil was ancient Greece’s most valuable export. The highest quality oils were shipped across the Mediterranean in ceramic transport vessels called amphorae, and the trade functioned much like the modern wine industry, with buyers paying premiums for specific regions and varieties. Athens, in particular, built significant wealth on olive oil exports.
The sheer value of olive oil is easiest to grasp through the prizes awarded at the Panathenaic Games, Athens’ premier athletic festival. Winners received enormous quantities of oil stored in specially decorated amphorae. The men’s winner of the 200-meter sprint took home roughly 1,000 gallons of olive oil. The boy’s winner received 500 gallons. Athletes typically resold this oil at about 12 drachmas per 10-gallon vessel. A skilled carpenter in Athens earned approximately 1 drachma per day, which means a single athletic victory could net the equivalent of three years’ wages.
This value explains why the Athenian lawmaker Solon, in the 6th century BC, made it a capital offense to cut down an olive tree without authorization. The death penalty for destroying a tree sounds extreme until you consider that olive groves were, in effect, the infrastructure of the Athenian economy.
Soap, Sunscreen, and Medicine
Before soap existed in Greece, olive oil served the same purpose. After exercising in the gymnasium or visiting the public baths, Greeks would drizzle oil from a small flask called an aryballos over their entire body. They then scraped off the mixture of oil, sweat, and dirt using a curved bronze tool called a strigil. This wasn’t a luxury routine; it was standard hygiene practice across Greek, Etruscan, and Roman cultures.
Olive oil also doubled as sun protection. Greeks working or training outdoors applied it to exposed skin much like modern sunscreen. In athletic training specifically, Hippocratic medical texts describe olive oil being rubbed into muscles before exercise to increase body temperature, improve flexibility, and prevent injuries. This made it an essential supply at every gymnasium.
Lighting the Ancient World
After dark, olive oil kept Greek cities and homes illuminated. Oil lamps, typically small ceramic dishes with a wick, burned olive oil as their primary fuel throughout the Mediterranean. These lamps served both practical and religious purposes. Innkeepers and barkeepers lit their businesses and the surrounding streets with them. Wealthy citizens used lamps to light their paths when traveling after dark. Temples and shrines kept oil lamps burning for both illumination and ritual.
Greek lamp-making became an industry of its own. Between the 6th and 4th centuries BC, Greek-made oil lamps were exported across the entire Mediterranean, prized for their craftsmanship. Even the leftover material from oil production found a use: charred and crushed olive pits served as fuel for the presses and kilns, so almost nothing went to waste.
A Sacred Tree in Greek Mythology
The olive tree’s importance was woven into the origin story of Athens itself. In Greek mythology, Athena and Poseidon competed to become the patron god of the city. Poseidon struck the ground with his trident and produced a saltwater spring. Athena planted an olive tree. The citizens chose Athena’s gift, judging it the more useful and enduring offering, a source of food, oil, and wood that symbolized peace, wisdom, and prosperity. The city took her name.
This wasn’t just a story. A sacred olive tree was said to grow on the Acropolis, and its survival was treated as a sign of divine favor. The connection between Athena, olives, and Athenian identity ran deep enough to shape civic pride for centuries.
The Olive Wreath at Olympia
At the ancient Olympic Games, the sole prize for each event was a wreath of wild olive leaves called a kotinos. The branches came from a specific sacred tree growing near the temple of Zeus at Olympia, and they were woven into a circle or horseshoe shape. There were no silver medals, no runner-up prizes. One winner per event, crowned with leaves.
The Greek historian Herodotus recorded a telling exchange after the Battle of Thermopylae. When the Persian king Xerxes learned that Greek soldiers had left the front lines to compete at Olympia, he asked what prize the winners received. “An olive wreath,” came the answer. One of Xerxes’ generals reportedly replied: “What kind of men are these against whom you have brought us to fight? Men who do not compete for possessions, but for virtue.” The comedian Aristophanes took a less reverent angle, joking that Zeus must be poor if he could only afford to crown athletes with wild olive instead of gold.
Both reactions capture the same truth: the olive wreath’s value was entirely symbolic, and the Greeks considered that symbolism more meaningful than material reward. The kotinos represented excellence, favor from the gods, and a connection to the land itself.
Three Stages of Oil Production
Producing olive oil required specialized infrastructure that shaped the layout of Greek farms and estates. The process had three distinct stages: crushing the olives, pressing the crushed fruit to extract oil, and separating the oil from water and sediment. Crushing was done with stone mills, where heavy cylindrical millstones rolled over the olives on a flat stone base. The crushed pulp then went into a beam press or lever press, which applied sustained pressure to squeeze out the liquid. Finally, the oil was left to settle and separate naturally, since oil floats above water and fruit residue.
Large production sites had multiple mills running at once to handle the harvest. The infrastructure required significant investment in stone, timber, and labor, which meant olive oil production was often concentrated among wealthier landowners. But the returns justified the cost. A productive grove and a well-built press could generate exportable wealth for generations, since olive trees live for hundreds of years and bear fruit annually once mature.