That was a tough one. No logic involved unfortunately.

I don't think it's particularly hard...though I think the only way to solve it is through logic and educated guesses.

Well...I figure out SOME kind of picture that is NOT correct but fits in all the squares perfectly! Maybe I will come back to this one some other time b/c I'm frustrated at this point!

Only reason I got this one was by googling the Assassins Creed logo.

I agree with the above comments, the only way I managed to finish this was knowing what the logo looked like and by assuming symmetry.

C1/R12,16
C23 the same
The bottom part which you can figure out logically is not connected to the top part.
And google Assasin's Creed Logo.

Thank you.