The idea and plan of the Aeneid are derived from Homer. As the wrath of Achilles is the mainspring of the Iliad, so the unity of the Aeneid results from the anger of Juno. The arrival of Aeneas in Italy after the destruction of Troy, the obstacles that opposed him through the intervention of Juno, and the adventures and the victories of the hero form the subject of the poem. Leaving Sicily for Latium, Aeneas is driven on the coast of Africa by a tempest raised against him by Juno; at Carthage he is welcomed by the queen, Dido, to whom he relates his past adventures and sufferings. By his narrative he wins her love, but at the command of Jupiter abandons her. Unable to retain him, Dido, in the despair of her passion, destroys herself. After passing through many dangers, under the guidance of the Sibyl of Cumae, he descends into the kingdom of the dead to consult the shade of his father. There appear to him the souls of the future heroes of Rome. On his return, he becomes a friend of the king of Latium, who promises to him the hand of his daughter, which is eagerly sought by King Turnus. A fearful war ensues between the rival lovers, which ends in the victory of Aeneas. Though the poem of Virgil is in many passages an imitation from the Iliad and the Odyssey, the Roman element predominates in it, and the Aeneid is the true national poem of Rome. There was no subject more adapted to flatter the vanity of the Romans, than the splendor and antiquity of their origin. Augustus is evidently typified under the character of Aeneas; Cleopatra is boldly sketched as Dido; and Turnus as the popular Antony. The love and death of Dido, the passionate victim of an unrequited love, give occasion to the poet to sing the victories of his countrymen over their Carthaginian rivals; the Pythagorean metempsychosis, which he adopts in the description of Elysium, affords an opportunity to exalt the heroes of Rome; and the wars of Aeneas allow him to describe the localities and the manners of ancient Latium with such truthfulness as to give to his verses the authority of historical quotations. In style, the Aeneid is a model of purity and elegance, and for the variety and the harmony of its incidents, for the power of its descriptions, and for the interest of its plot and episodes, second only to the Iliad. It has been observed that Virgil's descriptions are more like landscape painting than those of any of his predecessors, whether Greek or Roman, and it is a remarkable fact, that landscape painting was first introduced in his time.