Valhalla (Old Norse Valhöll,”hall of the slain”), in Old Norse mythology, the hall of slain heroes, ruled by the king of the gods, Odin, in the realm of the gods, Asgard. The hall had 540 doors, through each of which 800 heroes could walk abreast, and the roof was made of shields. The souls of heroic soldiers killed in battle were brought to Valhalla by warrior maidens called Valkyries. The heroes fought during the day, but their wounds healed before night, when they banqueted with Odin.