The House of Nobles - Compilation of Ideas [WIP]

This thread is a continuation of this thread. It is meant to gather all suggestions, ideas and help us flesh out the world around the nobility.

I will try to keep this thread up to date with the latest additions. Moderators are of course free to help should they feel so inclined.

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As was suggested by Mordazan in the thread mentioned above, we'll need guidelines on how interaction with nobles should be. How should they be treated? What privileges set them apart from the commoners? What are the forms of address? etc.