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No more than is already said elsewhere on these premises or in the quoted books - and certainly no more than you must know about them ;) (Reminds me: what can we do to have you write a book on...

It could of course be something comparable to the Regensburg thing. But there is a better explanation.

Just as there are more Sonne(n)bergs, there is more than one Lauenstein. The one you mention...