According to Chinese legend ,the first magic square appeared to the emperor Yu while he was walking beside the Yellow River more than 4000 years ago , on the shell of a turtle.
In the square the sum of the numbers from 1 to 9 , in each row, column and diagonal add up to 15.
also known as Lo Shu Square
The Magic Squares all together: Hommage to Albrecht Durer and The 26
