Okay kiddo, a cathedral is a really big and fancy church with tall spires and beautiful stained glass windows. One famous cathedral is in France and it's called Notre-Dame de Paris, which means "Our Lady of Paris." It was built a long, long time ago and has been an important place for people to pray and worship.
Now let's talk about Berlin. That's a big city in Germany. There is a cathedral there too, called the Berliner Dom. It's not quite as famous as Notre-Dame, but it's still pretty cool. The Berliner Dom also has tall spires and stained glass windows, but it's built in a different style than Notre-Dame.
Both of these cathedrals are important parts of their cities and attract a lot of visitors who want to see their beauty and learn about their history.