You have a minor misspelling in the following sentence:

Famous Nigerian artist Ben Enwonwu (often considered Nigeria's most renowned contemporary artist and credited as the father of Nigerian modernism, died in 1994) has created 3 versions of Tutu in 1970th and all of them have dissapeared completely more than 40 years ago while one of the portrait (which has been sold in auction) was being discovered in some of London flat last year.