Which historic observatory was instrumental in Edwin Hubble's work proving the expansion of the universe?

Answer

Mount Wilson Observatory

The Mount Wilson Observatory in Pasadena, California, holds immense historical significance because its telescopes, including the 100-inch Hooker Telescope, were used by Edwin Hubble to provide evidence for the expansion of the universe.

Which historic observatory was instrumental in Edwin Hubble's work proving the expansion of the universe?
locationastronomytelescopeobservatory