T'Klass's Pillar was a spire of ancient red rock on the planet Vulcan which was situated at Mount Seleya and was close to Surak's Peak. In 2156, during the Earth-Romulan War, T'Pol met Minister Kuvak in order to determine why the Confederacy of Vulcan was not aiding the Coalition of Planets against the Romulan Star Empire. During the meeting, she met Administrator T'Pau who emerged from T'Klass's Pillar in order to explain her reasoning. (ENT novel: Beneath the Raptor's Wing)