Tal'Ihnor Gates

Tal'lhnor Gates is a black hole that was near the Romulan border and was the Klingon Empire's primary energy production facility until 2291. During the Klingon Civil War of 2291, Melkor the Usurper offered the Romulan Star Empire possession of several important systems in exchange for support to attain leadership of the Imperial throne.

The black hole was unfortunately destroyed when Melkor detonated a powerful gravitational attenuation device as an act of spite, rather then let it full into General Chang's hands.

(TOS game: Klingon Academy'')