Charles IV, Holy Roman Emperor - Tour of Karlštejn Castle

Kiddo will tour my 17th Great Grandfather's castle in a few days! It's a summer tour with a Youth Symphony.

Has anyone been to the castle?

"Karlštejn Castle holds an absolutely exceptional position among Czech castles. It was established by the Czech king and Roman emperor Charles IV as a place to store the royal treasures, collections of holy relics and the crown jewels. The very impressive layout of the castle buildings from the settlement outside the castle walls right up to the Imperial Palace and the towers rising over it will captivate you with their ingenuity. In the castle Chapel of the Holy Cross, you will then merely contemplate the pictures of Master Theodoric in silent wonder. Set out for the most-visited castle in the Czech Republic and discover the treasures it has hidden for centuries!"
https://czechtourism.com/c/karlstejn-castle/