ELI5: Explain Like I'm 5

Interrex (Poland)

Okay kiddo, so imagine you have a group of friends who can't decide who should be the leader of their game. They might choose one kid to be in charge for a little while, but then they might pick someone else later on.

Well, that's kind of what an interrex was in Poland a long time ago. It was a person who was put in charge temporarily when the king or queen died, but before the new king or queen was chosen.

The interrex would make sure everything ran smoothly while everyone was figuring out who the next leader should be. They might even help make the decision by talking to all the important people and trying to figure out who would be the best fit for the job.

So basically, an interrex was like a temporary babysitter for the country until a new king or queen was chosen. Pretty cool, huh?