Vetruvis was the largest settlement on the Romulan planet Terix II. In 2381, a rally supporting Vulcan and Romulan reunification was held in Vetruvis. Spock was due to speak at the event and he also took the opportunity to pass information to Federation President Nanietta Bacco through Slask, a Gorn associate of Bacco. (ST - Typhon Pact novel: Rough Beasts of Empire)