Tieran's ship was a type of ship utilized by the Ilari during the late 24th century. One of these vessels was used by the Ilari tyrant Tieran, along with Nori and Adin.
In 2373, the vessel was attacked by unknown assailants (presumed to be forces of the Ilari Autarch) and pursued across half the sector. The attackers were driven off, but not before the ship's warp core was heavily damaged, causing drive plasma and gamma radiation to escape. The USS Voyager encountered the damaged starship, and rescued the three inhabitants shortly before the vessel was destroyed. (VOY: "Warlord")
For more information on this studio model, see TNG studio models.