A1ONE aka Tanha is the street name of a persian graffiti writer. Being the Pioneer in Arabic/Persian stylewriting and graffit, he was the first person who wrote the walls of Tehran. He tagged his pieces as „Alone“ which was misunderstood by the public as A1ONE. His style varies from portraits to calligraphy. In 2012 he was arrested by Iran authorities under the charge of social and political reasons and was held in prison for some time, so he agreed to leave the country. He now lives in Germany as far as I know.