Yes, that picture of the Neopolitan is chopped. The world's largest (heaviest) dog was an English Mastiff...there are pictures on the internet somewhere....
I have an English Mastiff, and they are indeed wonderful animals. We have a 'little' girl, so she probably won't go much more than 170 or 180, but the breeder has dogs in the 260 range.
This is Maggie:

