As I may have mentioned, I'm no great fan of zoos; at worst they seems little more than prisons where humans gawp at the inmates, not all of whom are kept in decent conditions; at best, well, ...
I never dreamt, however, that humans were once exhibited in zoos, but we [*] were. I learnt this from a drama about the Berlin Charité hospital in the late 1890s. And yet I could hardly believe it, so I looked it up to make sure; and my view of humanity – already pretty dim – dropped another notch or two. It was a widespread practice, it seems. And don't think it didn't happen in your country because it likely did. At the very least you might try to find out.
How did I not know this already I asked myself. We Europeans have kept very quiet about this shame. What were we thinking? Well, I think it's pretty obvious what we were thinking. The practice went on well into the 20th century and some of the pictures on these websites are hard to bear.
Meanwhile, I see that at the August CITES meeting, European zoos persisted with their campaign to be allowed to continue to import young African elephants. Inevitably, they say this is for "conservation".
* The "we" here is disingenuous. "we" "civilised" Europeans weren't exhibited; we were the ones doing the gawping. It was "lesser" peoples who were subject to scrutiny.