Iconia
Iconia, also known as the Iconian homeworld or Iconia Prime, was a formerly inhabited planet located in the Beta Quadrant. This planet was located at coordinates two two seven mark three five nine. 

In the distant past, this was the homeworld of the presumed extinct Iconian species and the capital planet of their empire. It was located in what was, in the 24th century, the Romulan Neutral Zone. The planet was devastated by a massive orbital bombardment approximately 200,000 years ago. The Iconians were believed to have been annihilated, although a part of the population may have escaped through their gateways. By the 24th century, the planet had one working automated structure which launched probes at orbiting ships.

In 2257, during the first , Iconia's system was occupied by the Klingons. ()

In 2259, the location of this planet was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a green color, indicating that it was affiliated with the Romulan Star Empire. ()

The precise location of Iconia was lost to history until 2365, when an artifact bearing an ancient starmap was discovered in an archaeological dig on Denius III. From there, Captain Donald Varley of the Federation starship  was able to locate Iconia, and chose to violate the Neutral Zone to reach the planet in order to prevent Iconian technology from falling into Romulan hands. After the Yamato was destroyed by an Iconian software transmission, the  and the Romulan warbird Haakona both traveled to Iconia, where Captain Jean-Luc Picard had the last operational structure on the surface destroyed. ()

In 2372, Worf told the crew of the  of the events that had taken place on Iconia when they were on a mission to destroy an Iconian gateway on Vandros IV in the Gamma Quadrant. ()

Appendices

Background information 
According to the , the surface of Iconia was a matte painting designed by visual effects supervisor Dan Curry. The Iconian control building, a model used as part of the painting, was designed by Mike Okuda, based on two swimming pool filter covers and part of the  drydock model.

The planet model first used here for Iconia would later be used for Cor Caroli V ().

Michael Chabon, the former showrunner for , named a Beta Quadrant sector after this planet in the blog article "Some Notes on Freecloud". Along with the Alpha Doradus system, which contained the inhabited planet Freecloud, this sector included the negotiated terminus of the Romulan Neutral Zone.

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Planets
Romulan Neutral Zone
Homeworlds