The Trojan Horse. To find out more about the wooden horse built by the Greeks, see this Wikipedia article: link; for information about the image: image source.
This shows the famous moment when the Trojans (you can see King Priam looking out over the wall) agree to bring the wooden horse into their city, not realizing that it is full of Greek warriors. In the foreground, you can see the treacherous Sinon, who has let himself be captured by the Trojans; he is pretending to be an enemy of the Greeks, revealing the secret power of the horse to the Trojans. The poor Trojans believe Sinon and bring the horse into the city... and at nightfall, the Greek warriors come out of the horse and the destruction of the city begins.
You can also find more myths and legends for the week of June 24-30 here. For more information and links to the actual javascript code, see the Myths & Legends Widget Reference Page.