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Re:Unveiling the first-ever image of a black hole [video] by dmix on Wednesday April 10, 2019 @01:27PM (#19626878)
It's a little of both, but yes Schwarzschild technically first predicted them.

> In 1915, Albert Einstein developed his theory of general relativity, having earlier shown that gravity does influence light's motion. Only a few months later, Karl Schwarzschild found a solution to the Einstein field equations, which describes the gravitational field of a point mass and a spherical mass.

https://en.wikipedia.org/wiki/Black_hole#History

Re:Unveiling the first-ever image of a black hole [video] by limbicsystem on Wednesday April 10, 2019 @01:58PM (#19627184)
Or was it the Revd. John Michell? https://en.wikipedia.org/wiki/John_Michell
Re:Unveiling the first-ever image of a black hole [video] by TheOtherHobbes on Wednesday April 10, 2019 @03:10PM (#19627800)
Michell. And maybe Laplace.

Of course they "invented" Newtonian black holes, not relativistic black holes.

Even so - well ahead of the rest.