Worlds Biggest Dog

Hi all! Recently I came across a question that who is the worlds biggest dog? This question has left me so curious that I'm asking this to everyone I meet but still I haven't found the answer. If anyone out there can tell me, please come forward with the name of the dog, it's breed, it's dimensions (height and weight) and who owns this dog? I want all the possible details that you can provide me regarding this dog as my curiousness for the answer of this question is increasing day by day. Please tell me any websites where I can get pictures of this dog, I'll be thankful to you!