IRW Valdore

The IRW Valdore was a Romulan Mogai Class warbird starship of the Star Empire's Star Navy in the 24th century, under the command of Commander Donatra. The Valdore was Donatra's base of operations in the 2379 Battle of Bassen Rift, where her small task force joined with the USS Enterprise (NCC-1701-E) to stop Shinzon of Remus from attacking the Federation capital planet, Earth.

The Valdore later served in the battle with Reman forces in orbit of Romulus just prior to the treaty establishing Remus as a protectorate of the Klingon Empire, and was transported to the Small Magellenic Cloud while investigating the disappearance of a Romulan fleet loyal to Donatra. The Valdore later made it safely back to the Milky Way Galaxy.

The Valdore was amongst those ships loyal to Donatra that assumed control of Achernar Prime in 2380; it became the flagship of the Imperial Romulan State after Donatra declared its existence in December of that year.

Alternate Reality
In the alternate reality created by Nero, the USS Enterprise encountered the Valdore in Romulan space in the mid 23rd century. The Enterprise battled and, with some difficulty, defeated the Valdore. Captain Kirk remarked that the ship was a bit bigger than he had expected. ''How or why the Valdore exists in the 23rd century of the alternate reality is not clear. It is possible the ship was simply built earlier in that timeline, or that it's a predecessor to Donatra's ship. However, the ship appears identical to Donatra's Valdore. Additionally, it is possible that the Valdore somehow traveled back through time, perhaps through the same black hole used by Nero to reach the past.''