Ra'tleihfi was a city on Romulus that was the capital city of the Romulan Star Empire through the late 23rd century. It was constructed in the first century A.S. (After Settlement) on the order of the so-called "Ruling Queen" Vriha t'Rehu, though construction was still in progress at the time of her death.
In 2276 Leonard McCoy thought this city looked more like New York City than LA Plex. The buildings in this city had a style similar to Art Deco and Doric order art. (TOS - Rihannsu novel: The Romulan Way)
During the battle for Romulus in the subsequent Romulan Civil War, the Imperial Ground Force concentrated its remaining troops around the city and engaged Free Rihannsu ground forces at the nearby Valley of the Firefalls. (TOS - Rihannsu novel: The Empty Chair)
- Novels written after Star Trek Nemesis give the Romulan capital as Ki Baratan, possibly implying the seat of government had moved by the late 24th century.