Focus on St. John the Evangelist on Patmos and explain the abstract.
St. John on Patmos  is an oil on panel painting by Hieronymus Bosch, created c. 1489. The painting is held in the Gemäldegalerie, in Berlin, Germany. The reverse is also painted, the title of that picture is Scenes from the Passion of Christ and the Pelican with Her Young.
Berlin Bosch Hieronymus Bosch Gemäldegalerie Patmos Germany