

When the nascent Tribunal Temple moved forward to re-create the First Council, which they renamed as the Grand Council of Morrowind, House Telvanni was admitted as one of the ruling Great Houses. Nerevar eventually gathered the Houses and Ashlander Clans to attack the fortress of Red Mountain which led to a victory at the Battle of Red Mountain. Early in the conflict, they and the other Great Houses were considered dispersed and poorly organized, suffering multiple defeats until Indoril Nerevar was made Hortator. House Telvanni was already an active Chimer House by the time the War of the First Council broke out in earnest, and fought alongside House Indoril, Dres, Redoran and Hlaalu against the secular House Dagoth and the Dwemer. The relic vault was used to seal away objects of mystical potency that were considered too dangerous to circulate in the world. In ancient times, the Telvanni built Heimlyn Keep, the site of a relic vault which the House was charged with protecting. The six tombs were rediscovered in 2E 582, alongside the other twenty-four families and the Library of Andule itself. The locations of the tombs were presumed lost in the aftermath of the War of the First Council, along with the Library of Andule and the records contained within. Six of the thirty Revered Families hailed from House Telvanni the Andas, Hlervu, Lleran, Releth, Sadryon, and Telvayn Clans. Prior to the War, thirty of the most influential and revered Chimer Clans worked together to build the fabled Library of Andule, a grand repository containing the genealogical records related to the earliest Velothi settlers and other assorted knowledge about the earliest history of the Great Houses. House Telvanni was founded in ancient times, predating the War of the First Council. History First Era "The forceful expression of will gives true honor to the Ancestors." - Mottos of the Dunmeri Great Houses Saint Vorys the Immolant was the patron saint of House Telvanni as late as 2E 582, but fell out of reverence by 3E 427. Their lords and Mouths were willing to speak to vampires wizards did not fear vampires nearly as much as other folk did. On the other hand, the Telvanni did not have the usual hatred of vampires that most other factions held. However, the Telvanni themselves were universally disliked or disapproved of by all other factions found in Vvardenfell as late as 3E 427. In general, the Telvanni did not interact with other Houses or Guilds, nor did they have many enemies save for Abolitionists and the Imperial Mages Guild. The Telvanni lords had an isolationist outlook, and did not intend to be presided over by any other institutions, particularly the Imperial Mages Guild of the Third Era.

Most Telvanni lords want little more than to be left alone to their research and ambitions. It was common for members of the House to rise through the ranks by eliminating or otherwise 'indisposing' other members. The house is comprised primarily of highly egocentric and ambitious mages, and is known to many as the house of the master wizard. It governed the Telvanni District of eastern Morrowind, and administered the eastern portion of the Vvardenfell District from its council seat in Sadrith Mora.

House Telvanni is one of the Great Houses of Morrowind. "House Telvanni matches the disposition of my brother Sotha Sil - iconoclastic, profane, unconventional." – Vivec
