Clever

It's the bald guy he is fucking the bat.

That's a dead bat right there. They cannot start their flight from a grounded position.

I get the joke but it's not working out.

The bat would see people upside down all the time, so will paint them upside down... While also hanging on the ceiling. Aka, making them right side up

I thought the light fixtures doubled as viewing spots for gallery goers similarly afflicted as the artist and I was pleased by this detail. Then I noticed there wasn't one in front of the small one, so they're probably just light fixtures after all.

Do you know about Felipe V and Xàtiva (Valencia, Spain)?