The Science journal has a special issue about the Einstein legacy. This is how they describe it:
"In 1915, Albert Einstein was a celebrity. His idea of seamlessly interwoven space and time—spacetime—had revolutionized physics and dazzled the world. Then he published his masterpiece: a short paper describing how warped spacetime creates gravity. A century later, that "general theory of relativity" remains a pillar of physics and Einstein a peerless scientific icon."