Who is Andrey Rublyov from Sculpting in Time: Reflections on the Cinema and what is their importance?

Rublyov was a famous Russian painter of the fifteenth century. Tarkovsky created a biography of the painter in a 1966 film. In the film, Rublyov goes on a journey from cloistered monastery to first-hand witness of the ills of the world, but in the end the painter remains full of hope and love for mankind.