The Tral Katra were an aspect of Vulcan civilization. They were the secretive keepers of the spirits of the past and resided at the Fal-lan-tral on Vulcan near Mount Seleya. The secrets of Tral Katra were never revealed to offworlders, with many rumors existing about them. Some rumors of them held that the Tral Katra were enormous crystals which held the wisdom of Vulcan's departed while others stories claimed that they were Vulcan priestesses who sat in yearlong meditations as they held the katra of thousands of dead Vulcans.