Gas lighting was the norm for Vienna until after WW I when electricity became big. Our house was wired for electricity right from the beginning in 1913, back then it was something unusual to have electricity in _all_ apartments of a house. Power was 220V DC back then, each apartment of 1000 sq. feet having two 4amp circuits for lights and sockets.

My grandmother from Germany was born in 1925 and still remembers having gas light at her first childhood home.

I'd say that wasn't even a mansion, that was a castle!

You're sure you didn't get the bids for the Royal Castle of Stockholm, are you? [Linked Image]