Haussner’s opened in 1926 and served its last meal in 1999. My matchbook from it advertises its Bavarian Rathskeller and Haussner’s Bavarian Orchestra. The restaurant was famous for its art collection, which sold at auction after the restaurant closed for ten million dollars. As luck would have it, I spent the day a block down from Haussner’s at the Maryland Traditions Folklife Festival, so I took some pictures of the building.
Some info about a recreation of Haussner’s which appeared in Mad Men
Diner Hunter 
When I went to “Elvis’ Birthday Fight Club” at the Creative Alliance theater back in January… I parked very near Haussner’s and meant to check it out on the web when I got home. It slipped my mind afterwards; but now = Mystery Solved! 🙂
So sad Haussner’s had to close. Just another nail in the coffin regarding Baltimore German heritage.
I never ate there and I’m poorer for having never experienced it.