Heartland over the world tree

Before the founding of Switzerland, it was the embryonic age when a nation was about to be born there.
The forest country of Uri was an independent, autonomous community headed by the monastery of Fraumünster, and its people lived an idyllic, free and independent life.
Its autonomy was a direct democracy with politics decided by a blue sky council, and its autonomy independent of the lords was a patent obtained from the king.
The Holy Roman Empire lasted for a long time, called the "Great Interregnum" Where the vacancy of the King continued. Therefore, each country built its own autonomy.
But Rudolph von Habsburg became king, and those territories were under the royal rule one after another.

The fury of that king was suddenly upon Uri.
The young lord of Rapperswill, the guardian of the monastic realm, had died suddenly, his successor had died, his rights had become temporary custody of the royal family, and the people were under pressure from the royal family.

One day, Shepherd's Arnold and his sister Ita chased the lost lamb and found a big ork tree and a small house in the forest. Then they met the children of mountain people, and heard that the sheep was taken away by someone.
Furthermore, as they were walking around looking for them, they met the noble daughters there. The children of the royal family of the neighboring country were having a picnic there.
Ita was liked by the royal children, which led to all sorts of historical events for this brother and sister and Uri.
And these children find a heartland that is now invisible in Central Europe, and with Wilhelm Tell, a master of crossbow, he will make an autonomous community that is the predecessor of Switzerland.

People who read this story will be able to take their children on a journey through the landscapes and customs of that time in medieval Central Europe that have now disappeared.
Will we reach the brilliant days of the founding of Switzerland?