As a mathematician I'd like to draw your attention to the magic square on the Passion facade of the Sagrada Familia, with magic constant 33, the final age of Jesus. It has repeated numbers so it is considered trivial or not a magic square at all by some definitions (after all you could always set every cell equal to 1 to satisfy the other conditions). There are non trivial magic squares with constant 33. Nevertheless, this example is noteworthy.