Collected from queens court and had dragon statue in "the box" but it wouldn't allow me to place or store as got "up to limit" message. I placed & sold one from storage (I had 5 in inventory) but it didn't resolve it, I had to sell it to free the castle.(which I should have done in the first place if I thought about it)
So no only did I lose my reward..I'm down another.
Do all statues have an overall limit (like buildings) ? As there is no information about limits.