Laplace (1795) noted that
a consequence of Newtonian gravity and Newton's corpuscular theory of light was
that light could not escape from an
object of sufficiently large mass and small radius.
Schwarzschild (1916) derived a general relativistic solution for the gravitational field surrounding a spherical mass: Schwarzschild black holes.
Wheeler (1968) studies the problem of gravitational collapse - coins the term black hole.