Airbus A390 will be a ten-deck airliner (if made), seven for passengers, and three for cargo. It will have six engines.
http://www.travelfox.com/archive/20040705.htm

I wonder how are they gonna get people in and out of that huge thing called A390. They're gonna have to have special airports with special gates to park this thing. Seven stories! How are they gonna get atleast seven tunnels on the airports for one airplane.
I don't think that's gonna happen. That's only a
"concept"
airplane.