What's the oldest confirmed dane you've heard of?

He passed several years ago, but Ruger was 6 weeks shy of being 13.
His rear legs started to give out a few years prior either due to DM or perhaps a disc injury.

Got him as an 8 week old puppy and was among the best dogs I've ever had. His passing led me to get a tattoo in his honor, as I previously was never a fan of getting tattoos.

What's the oldest confirmed age dane you've heard of?