Rose Jaffe is painted on the wall of the A-1 Grocery Store in the Deanwood Neighborhood in Washington, DC.
Muhammad Ali would seem to need no introduction but Wikipedia says this:
"Muhammad Ali, born Cassius Marcellus Clay Jr., (January 17, 1942 – June 3, 2016) was an American professional boxer and activist. He is widely regarded as one of the most significant and celebrated sports figures of the 20th century. From early in his career, Ali was known as an inspiring, controversial, and polarizing figure both inside and outside the ring."The mural has a quote from Muhammad Ali:
"A man who has no imagination
has no wings"
Max the Mighty gives us this photo of badass artist Rose Jaffe painting the mural: