Rogier van der Weyden - Dream of Pope Sergius.

Dream of Pope Sergius. The scene is set around 705 in Rome. An angel appears to Pope Sergius in a dream, telling him to appoint a pilgrim named Hubert to the office of the murdered Bishop of Liège, St. Lambert. At the very back, outside the portal of a cathedral, the Pope is giving Hubert the Episcopal crozier and miter