A Star Destroyer was a dagger-shaped type of capital ship that were used by the Galactic Republic, the Galactic Empire, the First Order and the Sith Eternal.
Notable examples of Star Destroyers include the Imperial-class Star Destroyer and its predecessor the Venator-class Star Destroyer.
According to Everi Chalis, Star Destroyers were the most resource-intensive ships the galaxy had ever seen, and only Kuat possessed shipyards that were capable of supporting and maintaining more than a handful at a time.