"It was Muhammad Ali's birthday this week; he would have turned eighty-two. I had the privilege of being with him on two memorable occasions, both close to his birthday celebrations. First, when my portraits of Ali and Obama were unveiled at the Kentucky Bluegrass Ball, and then at his home in Louisville the day after Leroy Neiman spent the afternoon admiring my paintings on the walls there. Rumor has it that Ali gave one of them to George Clooney. Painting and spending time with Muhammad Ali marked a high point in my artistic career. In honor of his birthday week, I'm sharing one of the super rare portraits personally signed by him. Please call for availability. Rest in peace, GOAT." - Simon Bull