A Night at Karlstein () is a 1973 Czech historical musical film directed by ZdenÃÂk 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 travels to Karlà ¡tejn castle to meet him. There she finds out that women are banned from Karlà ¡tejn. She disguised herself as a young man so she can sneak inside the castle.