Goloroth was a planet located in the Romulan Neutral Zone that was the site of a top secret Tal Shiar base.
In the year 2375, Goloroth was the site of the Battle of Goloroth between the Dominion and the Romulan Star Empire that resulted in a Romulan victory. (ST - Tales of the Dominion War short story: "Twilight's Wrath")