Amphion and Zethus visited Thebes, where they expelled King Laius and built the lower city, Cadmus having already built the upper. Now, Zethus had often taunted Amphion for his devotion to the lyre given him by Hermes. ‘It distracts you’, he would say, ‘from useful work.’ Yet when they became masons, Amphion’s stones moved to the sound of his lyre and gently slid into place, while Zethus was obliged to use main force, lagging far behind his brother. The twins ruled jointly in Thebes, where Zethus married Thebe, after whom the city—previously known as Cadmeia—is now named; and Amphion married Niobe. But all her children except two were shot dead by Apollo and Artemis, whose mother Leto she had insulted. Amphion was himself killed by Apollo for trying to take vengeance on the Delphic priests, and further punished in Tartarus.