So, you know how sometimes different parts of a big place might have their own special leader or boss? Like how your school has a principal, but your classroom has a teacher?
Well a really long time ago, there was a big area in Europe called Flanders. But it was so big that it needed someone to be in charge of it and make sure things were going okay. So they picked someone to be the Count of Flanders, which was like the boss of that whole place.
The Count of Flanders was in charge of making sure everyone was safe, making rules for people to follow, and helping people who needed it. It was a very important job, kind of like being the leader of a big team.
Over time, different people became the Count of Flanders, and the job changed a lot. But at its core, it was always about making sure the people living in Flanders had someone looking out for them and making sure things were okay.