Most castle wall built prior to the general use of firearms had portrals in the shape of crosses. The cross shape allowed the use of bows and crossbows at different angles ie: up or down, left or right. In military speak: “fields of fire”. Still used to this day with adaptations to modern weapons. A days drive in England will show you the whole array to include WWII “pillboxes” along some rural highways.
I got it, regarding the “fields of fire” thing. Want to go to Germany and see some examples? My kids started calling a naked hill, “Defective.” The hill must be defective - nobody built a castle on it.
Hellbender, I don’t think any stones fell out of that wall. I see places where wood used to be, stones set out for support of levers, and the like. But no missing stones.
Anyway, the point is, I was trying to remember the name of a specific movie, set in Transylvania or the like, that featured a castle full of crosses.
Not Dracula, or Vladamir Dracul, or any of those.