As previously stated, Leonhard Euler was the first to make 4x4 magic squares using squares in 1770. But no one has yet built a 3x3 magic square of squares or proven that it is impossible.

In 1876, Edouard Lucas worked on the subject. Martin Gardner then offered $100 to the first person who could build one in 1996. Because this problem, despite its seeming simplicity, is extremely difficult to answer with nine separate squared integers. (I play redactle game )