Stephen Wiltshire was diagnosed with autism at the age of 3. He was mute and didn't relate with other people. However, he is what is called an autistic savant
. It is like a deaf person can see sharper, or a blind person can hear things others can't. Stephen is able to draw anything he sees, from memory, like the entire city of Rome
has a large gallery of his work, and also some prints/originals for sale. Some one needs to teach him how to pixel.