RIS D'ridthau

The IRW D'ridthau was a Romulan starship in service in the 2370s.

In late 2375, it served as the Romulan flagship at the Battle of Cardassia, the final battle of the Dominion War. The D'ridthau was destroyed when the Dominion attacks caused the Romulan fleet lines to collapse. (DS9 novelization: "What You Leave Behind")