For ten years the Greeks besieged Troy, and for ten years its walls held. Achilles was dead, Hector was dead, and the war seemed endless. Then the Greeks built a great wooden horse, hid their best warriors inside it, and pretended to sail home. The Trojans, believing the war was over, dragged the horse into their city as a trophy. That night the warriors climbed out, opened the gates, and Troy fell.
The Trojan Horse is the most famous stratagem in history — so famous that its name now describes any hidden threat disguised as a gift, from military deceptions to computer malware. Yet surprisingly, the episode is barely mentioned in Homer’s Iliad, which ends before the city falls. The fullest surviving account comes from a Roman poet, Virgil, writing more than seven centuries later.
The Sources
The Iliad ends with the funeral of Hector and never mentions the horse. The Odyssey, however, refers to it three times. The bard Demodocus sings of it at the court of the Phaeacians, which makes Odysseus weep; Menelaus remembers how Helen walked around the horse at night imitating the voices of the Greek warriors’ wives, and how Odysseus clamped his hand over the mouth of Anticlus to stop him answering; and in the underworld, Odysseus tells the shade of Achilles how bravely his son Neoptolemus waited inside the horse.
Lost poems of the Epic Cycle — the Little Iliad and the Sack of Ilion — told the story in full; we know them only from later summaries. The most complete surviving account is Book 2 of Virgil’s Aeneid (19 BCE), told by the Trojan prince Aeneas, who survived the fall of the city. A later Greek epic, Quintus of Smyrna’s Posthomerica (fourth century CE), also describes it in detail.
The Plan
The idea is credited to Odysseus, the cleverest of the Greeks, inspired in some versions by the goddess Athena or the seer Calchas, who had watched a hawk fail to catch a dove by force and then succeed by hiding. The builder was Epeius, a Greek craftsman better known for his boxing than his bravery, who constructed the horse from the fir or maple wood of Mount Ida with Athena’s help.
The horse was hollow, with a hidden door in its side. Inside, according to different sources, were anywhere from nine to three thousand warriors; the most common figures are around thirty to fifty. They included Odysseus, Menelaus, Diomedes, Neoptolemus (son of Achilles), Philoctetes, and Epeius himself, who alone knew how to open the door. On its flank the Greeks inscribed a dedication: “For their return home, the Greeks dedicate this offering to Athena.”
The rest of the Greek army burned their camp and sailed away — but only as far as the island of Tenedos, just off the coast, where they hid behind its headland to wait for a signal.
The Morning After
At dawn the Trojans found the plain empty, the camp smoking, and the great horse standing on the shore. Crowds poured out of the city to look. The question was what to do with it. Some wanted to throw it off a cliff, some to burn it, some to break it open, and others to haul it into the city as an offering to Athena.
Laocoön
The priest Laocoön rushed down from the citadel. “Are you mad?” he cried. “Do you think the enemy has sailed away? Do you think any gift of the Greeks is free of trickery? Is this how you know Odysseus? Either Greeks are hiding in this wood, or it is an engine built against our walls. Whatever it is, I fear the Greeks even when they bring gifts” — in Virgil’s Latin, timeo Danaos et dona ferentes, one of the most quoted lines in literature. He hurled a spear into the horse’s side, and the hollow belly boomed.
Sinon
At that moment Trojan shepherds dragged in a young Greek with his hands tied: Sinon. He had been left behind on purpose, and he told a masterful lie. He was, he said, an enemy of Odysseus, who had arranged for him to be chosen as a human sacrifice to secure a fair wind home. He had escaped and hidden in a marsh. The Trojans, moved by pity, untied him and asked about the horse.
Sinon explained that the horse was an offering to Athena, whose favour the Greeks had lost when Odysseus and Diomedes stole her sacred image, the Palladium, from Troy. The Greeks had built it enormous deliberately — so that the Trojans could not bring it through their gates. For if the horse entered Troy, the city would be under Athena’s protection forever, and Troy would one day conquer Greece.
The Serpents
As if to confirm Sinon’s story, a terrible omen occurred. Two giant sea-serpents swam from Tenedos across the calm sea, their bloody crests high above the waves. They seized Laocoön’s two young sons and crushed them in their coils; when Laocoön ran to help, they wrapped him too, and he died screaming like a wounded bull at the altar. Then the serpents slid up to the citadel and hid at the feet of Athena’s statue.
The Trojans read the sign as punishment for Laocoön’s spear-thrust against a sacred offering. The famous marble sculpture of Laocoön and His Sons, rediscovered in Rome in 1506 and now in the Vatican Museums, depicts the moment of his agony.
Bringing the Horse In
The Trojans breached their own walls to make a gap large enough for the horse. They put rollers under its feet and ropes around its neck, and dragged it into the city amid singing and garlands. Four times it stuck at the threshold, and four times the weapons clashed inside its belly, but the Trojans took no notice.
Only Cassandra, daughter of King Priam, cried out that the horse would bring destruction. Apollo had given her the gift of prophecy, and when she refused his love, he cursed her so that no one would ever believe her. The Trojans ignored her and celebrated late into the night.
The Night of Fire
When the city was asleep, drunk from the festival, Sinon opened the trapdoor and let out the warriors, and signalled with a torch to the fleet at Tenedos. The warriors killed the sentries and opened the gates, and the returning army poured in.
The sack of Troy was brutal. Neoptolemus killed old King Priam at the altar of Zeus where he had taken refuge. The infant Astyanax, son of Hector, was thrown from the walls. Cassandra was dragged from Athena’s temple by the lesser Ajax. The Trojan women, including Queen Hecuba and Hector’s widow Andromache, were divided among the victors as slaves. Menelaus found Helen and meant to kill her, but at the sight of her beauty he dropped his sword.
Aeneas, warned by the ghost of Hector, fought until the city was lost, then escaped carrying his father Anchises on his shoulders and leading his young son by the hand. His descendants, the Romans believed, would found Rome.
The Greeks’ brutality in the sack offended the gods, and their homecomings were disastrous. The story of one of them is the Odyssey.
Was It Real?
Archaeologists have identified the site of Troy with the mound of Hisarlik in north-west Turkey, excavated first by Heinrich Schliemann in the 1870s. The layer known as Troy VIIa shows signs of destruction by fire around 1180 BCE, and many scholars think it may lie behind the legend of the sack.
A literal wooden horse remains unproven. Several theories have been proposed:
- A siege engine. Some ancient writers, including the travel writer Pausanias, thought the “horse” was a battering ram or siege tower, perhaps covered in wet horse hides.
- An earthquake. Poseidon was the god of both horses and earthquakes. A quake that breached the walls might have been remembered as Poseidon’s “horse.”
- A ship. Homer calls ships “horses of the sea,” and the Greeks may have smuggled in troops by ship.
- Pure story. The horse may simply be a brilliant fiction, invented to give the long war a clever ending.
Legacy
The Trojan Horse has become the universal symbol of deception disguised as a gift. Laocoön’s warning, “Beware of Greeks bearing gifts,” entered proverbial speech. Since the 1970s, a Trojan in computing has meant malicious software disguised as something useful. The horse has appeared in countless paintings, films, and novels, and a replica stands at the entrance to the archaeological site of Troy today — a wooden monument to the most successful trick in the history of storytelling.
Last reviewed: September 2026.