Zbirohy - a ruin hidden in the forest near Malá Skála

Zbirohy Castle is definitely worth a visit. What do we really know about this ruin? We can't find much information even on the Internet, they are all basically the same. The duration of the castle, as can be inferred from the preserved sources, was also relatively short, something around one hundred years. What can be said about this castle Hidden in a cluster of rocks and forest:
The castle was built high above the Jizera, where the river makes a big bend. The builders of the castle…