Which medal did Albert Einstein receive from the Royal Society in 1925?

Albert Einstein received the Copley Medal from the Royal Society in 1925. The award recognized his theory of relativity and his contributions to quantum theory, two bodies of work that had transformed modern physics.

The Copley Medal is one of the Royal Society's highest honors and is awarded for outstanding scientific achievement. First presented in 1731, it is also the world's oldest surviving scientific award. Einstein received it during a period when his theories were attracting international recognition, four years after he won the 1921 Nobel Prize in Physics.

The medal is sometimes confused with the Royal Medal, Davy Medal, or Hughes Medal because all are prestigious Royal Society awards. They are distinct honors with different histories and purposes. Einstein's other major recognitions included the Nobel Prize, the Gold Medal of the Royal Astronomical Society in 1926, and the Max Planck Medal in 1929.