Castles and resources question

[ceremony]

Taqwus said:
I'd be a bit surprised if castles were drawing resources from provinces owned by anybody else.

You are correct - they do not.

[krpeters]

Like they said -- castles do not get resources from provinces that are owned by other players... your castle gets the resources from your properties, and his from his.

I'm still not sure what your castle is doing for you, though -- providing you supplies? A safe place to hide while his army sieges you? A place to recruit forces?