The Catalan sculptor Josep Maria Subirach (b. 1927) has been working on the Passion Facade of the Sagrada Familia in Barcelona since 1987. One of the less noticeable projects are the huge bronze doors. Once we noticed these, we became fixated on the incredibly detailed and cryptic iconography on them.
Puzzles and words are important. The number square below has its own interesting symbolism. Each row and column add up to 33, as do the two diagonals, the four quadrants, and the four corners — representing Jesus’ age at his death. I actually use this as my lock screen on my phone!