The Voth city ship was a massive transwarp-capable starship that served as the center of the Voth civilization.

The Voth city ship located and captured the USS Voyager in 2373 and proceeded to beam the Federation starship aboard. Once aboard, the crew of the city ship established a ship-wide dampening field, which rendered tricorders, phasers, and main power inoperative. (VOY: "Distant Origin")

The studio model for the "Voth City Ship" was designed by Rick Sternbach.
In Star Trek Online, this design is known as the Citadel-class. Many vessels of the class are used as dreadnoughts by the Voth military.
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