The Fourth Gate itself consisted of four iron towers, with an immense iron Eagle placed between the two inner towers to represent Thorondor alighting amid the peaks. Between the towers a layered tracery of iron was set, designed in such a way that, though wrought of black iron, it gave the impression of depths of forest under moonlight. Beyond the Iron Gate stood ranks of Iron Guards, armed and armoured in black, and each bearing a helm with a visor fashioned as an Eagle's beak.