| INTERSTELLAR STATE | |
| Romulan Star Empire | |
| |
| Dominant species: | Romulan, Reman |
| Location: | Beta Quadrant |
| Capital: | Ki Baratan, Romulus |
| Principal City: | Krocton Segment, Romulus |
| Sovereignty: | prior to the 22nd century to 2160 |
| Military: | Romulan Imperial Fleet |
| Government | |
| System of government: | aristocratic authoritarian oligarchy |
| Legislature: | Tricameron (23rd century) Imperial Senate |
| Seat of government: | Hall of State |
| Head of state: | Praetor Emperor |
| Head of government: | Praetor Empress |
| People | |
| Currency: | Talons |
| Language: | Romulan ("Rihan") |
In the dark mirror universe, the Romulan Star Empire was once an interstellar state located in the Beta Quadrant until it was overthrown by the forces of the Terran Empire and it allies in the 2150s.