What is the secret of the magic square?

Could you please elaborate on the mystery behind the concept of a magic square? How does it function, and what is its allure that has captivated mathematicians and enthusiasts alike for centuries? What mathematical principles underpin its creation, and how do these principles contribute to its enchanting properties? Furthermore, what are some practical applications or intriguing theories surrounding the magic square that have emerged over time? I'm intrigued to delve deeper into this enigmatic puzzle.