No but others have.
He asked God.
You tell me.
Einstein didn't prove the theory of relativity. It is a theory, a possible explanation, it is generally accepted because it explains a lot of things but that doesn't "prove" the theory, at least not to physicists. See related questions for the country of discovery.
The Einstein Theory of Relativity was developed by Albert Einstein in 1905. This theory introduced the concepts of special relativity and general relativity, revolutionizing our understanding of space, time, and gravity.
Albert Einstein developed the theory of relativity.
In 1916
The Theory of Relativity was developed by Albert Einstein.
Special Relativity 1905 General Relativity completed 1915 published 1916
Albert Einstein developed the general theory of relativity and the special theory of relativity in the early 20th century. These groundbreaking theories revolutionized our understanding of gravity, space, and time.
The theory of relativity was first proposed by Albert Einstein in 1905, with his publication of the special theory of relativity. Later, in 1915, Einstein further developed his theory with the publication of the general theory of relativity.
Galileo Galile wrote "the Theory of Relativity", and Einstein wrote the General theory of relativity and the special theory of relativity.
Albert Einstein's theory of general relativity was published in 1915.