After frequent study trips through Europe , Asia , and Africa , in 1966 he visited the United States .
After frequent study trips through Europe , Asia , and Africa , in 1966 he settled permanently in Manhattan in 1970 , as a free - lance artist .
After frequent study trips through Europe , Asia , and Africa , in 1966 he visited the United States and settled permanently in Manhattan in 1970 , as a free - lance artist .