Needle

The Needle was an object one light-year long and fifty thousand kilometres in diameter, with one end affixed to a black hole.

History
The Needle had been Savar's TARDIS, but was caught by the black hole's gravitational pull and was stretched out when he tried to escape it. (PROSE: The Infinity Doctors)

Billions of years in the future, most of the people of the universe relocated to the Needle after a great disaster. (PROSE: Father Time) One of the inhabitants of the Needle was Griffin. (PROSE: Unnatural History)

Miranda Dawkins travelled to the future and became the Empress of the Needle. Many assassination attempts were made on her life by Prefect Ferran. Miranda eventually had a daughter called Zezanne on the Needle. (COMIC: Miranda, PROSE: Sometime Never...)

A few decades before the universe ended, the Needle was almost completely abandoned. The Doctor travelled there in search of Ohm. (PROSE: The Infinity Doctors)