Galactic Nuclei as Collapsed Old Quasars

@article{LyndenBell1969GalacticNA,
  title={Galactic Nuclei as Collapsed Old Quasars},
  author={Donald Lynden-Bell},
  journal={Nature},
  year={1969},
  volume={223},
  pages={690-694}
}
Powerful emissions from the centres of nearby galaxies may represent dead quasars. 
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TLDR
The evidence that most inactive galaxies contain black holes at their centres is reviewed, and how the local distribution of black holes is related to the population of active galaxies is explained.
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