I would have to go with the Mastiff X.
He is a beautiful dog though. Love the picture with the bone in his mouth.
He looks very happy and content. Which I guess is a good thing, considering his size
Hi Dogs Rule, whenever someone asks what breed is he is always just say a Mastiff x. It would be nice to actually know though as I'm thinking of getting another dog of a similar type to Bruno.
He is very, very well behaved. Not a bad bone in his body. He doesn't even bat an eyelid when the dogs next dog is barking at him all day long haha.
That photo with the bone is one of my favourites too :-)