Well done H. The big clue is the dragon in the left hand corner that has the top of the "barbers pole" (otherwise CBF member Lance) sticking out of it. The picture was painted by Carlo Crivelli in 1472. I very much doubt that an imaginary portrait of a Roman soldier and officer, and England's patron saint, would look anything like this if painted in (say) the nineteenth century - let alone today. Interesting how different generations perceive the ideal of manliness and heroism differently.
This probably raised pertinent questions about how we read pictures.