One of two homeworlds of the Romulan Star Empire, orbiting the star Romulus with its twin planet of Remus, and the site where a Vulcan offshoot race eventually settled after their split over two millenia ago.

The planet is divided poltically into provinces, with the cities made up of "segments." Its scenic wonders are many, including the Firefalls of Gal'gathong.

The homeworld of the Romulan Star Empire was attacked by Kor sometime during his lifetime, and Garak worked there at least a year as the gardener in the Cardassian Embassy.