I'm clearly a bit of a mic nerd...

and I've been fascinated by the history of the great European studio mics in general. For decades it was a friendly contest between Neumann (Germany) and AKG (Austria), and those two companies pushed each other to improve constantly with their contrasting designs and technologies.
Neumann is now owned by Sennheiser but Sennheiser has done a great job allowing Neumann to retain autonomy and a very high quality standard. AKG, meanwhile, is now owned by Samsung, who care more about quarterly profits than long-term quality, so they've cut a lot of corners in recent years, sadly, and moved all production out of Vienna. Austrian Audio is the result of some of the veteran AKG engineers being understandably disturbed by that, leaving AKG, and starting their own outfit in the old AKG facility... so they're carrying the honorable lineage of that technology more than the actual original company is and doing a great job of it.
In my studio I usually have one Neumann mic and one Austrian Audio mic set up at all times, much respect to both!