I have to confess that this is something I am surprised we don’t do more of. This is direct printed acrylic with magnets applied, and then cut into puzzle pieces. The puzzle pieces are numbered during cutting, and an enameled steel backer board is scored with the puzzle pattern, and (optionally) the corresponding piece number.
In this case, each stakeholder in the building of the pictured hospital was called up on stage during the event to add their piece to the puzzle. The completed puzzle is now on permanent display in the main lobby of the facility