Ok, so in Poland there is a city called Wawel, and a long time ago, a very important king named Krak lived there. He built a castle on a big hill called the Wawel Hill, and it became the most important place in Poland!
The Wawel Castle was very big and fancy, with lots of rooms and gardens for the king and his family to live in. They had special rooms for eating and sleeping, and even a throne room where the king would sit to talk to important people.
Lots of important events happened at the Wawel Castle. The king would have big parties and celebrations, and they even crowned new kings there sometimes.
The people who lived in the city were very proud of their royal city, and even today, lots of people like to visit to see the castle and learn about the history of Poland.