I'm putting this puzzle out a day early. It is the kind of puzzle the NYTimes would put out on a Thursday. The idea for this puzzle has rattled around my head for quite a while. It could be some time before my next puzzle as I have nothing in the works right now. Enjoy!
Today's puzzle is a 21x21. Likely the last of this size I will do. It took me at least 10x longer to fill and then far too long to clue. It has a few more answers than a NYT Sunday but 106 of 358 squares are themed which is pretty high. Overall I'd guess it is a little easier than a NYT Sunday due to there being many more short answers. Solve online or Print it out.
For whatever reason, I decided to make this puzzle with mirror symmetry along the diagonal. I have not seen this done before (although I'd be very surprised if it hasn't). 72 total answers so it's a bit open. I'd guess it is a NYTimes Thursday/Friday level of difficulty. Enjoy!
A word of warning. This is not a normal crossword puzzle. This is much more of a puzzle puzzle (and by that I mean a logic puzzle). I recommend printing it but if you can do the online version, more power to you! I should note that: there are no duplicate answers that the puzzle is solvable whether you know the answer to 23-Across or notall answers conform to standard Roman Numeric system. Solve online or get a printable version.