Kropow Castle is the heavily guarded keeping place of the Sceptre of King Ottokar IV of Syldavia. The castle's architecture has strong Bohemian influence.
Kropow Castle appears in King Ottokar's Sceptre as a primary target for the main villains. It is the location of The Ottokar Sceptre which, if captured, would force the rightful king of Syldavia to abdicate. Alfred Alembick managed to get into the castle and used stun gas to knock out the guards. He then shot the sceptre out the window.
In the original black-and-white version of King Ottokar's Sceptre, the guards who keep the castle wore uniforms similair to that of the Beefeaters who guard the Tower of London in England.