|Affiliation:||Romulan Star Empire, Romulan Star Navy|
The RIS Celvantius was a Romulan starship, a Raptor-class cruiser of the Star Empire's Star Navy in the 24th century. The Celvantius was in active service around the year 2377. (ST video game: Armada II)
- No history or fate is established for this vessel as its designation was randomly selected for a cruiser by the game software.