A Night at Karlstein (Czech: Noc na Karlštejně) is a 1973 Czech historical musical film directed by Zdeněk Podskalský, based on an 1884 play by Jaroslav Vrchlický.
The young queen Elizabeth of Pomerania waits in vain for her husband Emperor Charles IV at the Prague Castle.
She disguised herself as a young man so she can sneak inside the castle.
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