Celtris III

Celtris III is a planet in the Cardassian Union.

Elim Garak once visited the planet on a mission for the Obsidian Order. 

In 2369, the Cardassians used metagenic weapons on the planet to lure Jean-Luc Picard to the planet, where Gul Madred tortured him in a plan to learn classified Starfleet secrets.