Vvalti was a planet in the Beta Quadrant, within Romulan territory, and more than ten light-years from Romulus itself. (Star Trek: Picard; Chabon: "Two Final Notes on Romulans")
In 2366, Lurak T'Luco was arrested on Vvalti for hijacking a warbird with intent to sell stolen cargo. (PIC: "Disengage")
Following the supernova in 2387 and the subsequent collapse of the Romulan Star Empire, Vvalti became the capital of the Romulan Free State, the most powerful of the many factions that emerged from the Empire's fall. (Star Trek: Picard; Chabon: "Two Final Notes on Romulans")