One of the trickiest i've found on here! Good puzzle.

What even are we trying to get a picture of?

Hints? Anyone?

And another illogical one :) With a sad topic for me - I hate bullfighting...

SPOILER:
"OLE´" at the top, the rest is almost absolutely symmetric; full squares (to avoid some ambiguities): r1/c14, r5/c2, r5/c24, r10/c9,c13,c15-16,c18.

Ridiculous.took way too long.

Dave you are moron for endorsing this crap.

That's r1/c15, Joe but thanks for the rest of the hints!

Start in the middle of the bottom line.

OLE' starts in C8 and ends in C19. Complete rows 4-14 symmetrically, with the exception of the pieces that build down from the 11 in R7 and Joe's hints. r16-25 are also symmetrical, but there are diagonals from the 11 at the bottom up to the 8s, then back down toward the corners.