I think it's time to revive whatever the hell kind of hat Euler is wearing here
@pikesley looks like 'I found this blouse on the floor, I can put it on my head for later' kinda hat
@noodlemaz choices were made here
"OK Leonhard, we've got you booked in for your portrait sitting this afternoon"
"What should I wear?"
"Up to you, whatever you feel comfortable in, but consider that in 250 years' time, this might be the canonical image of you"