This is a unique portrait for the Florence of it's time.
It was very unusual for portraits to be composed with a veiw
from or to the outside landscape. Botticelli has painted
Giuliano in front of an open door, which in Florentine
humanistic symbolism meaning death or the passage from life
to the hereafter. It has been dated to 1478 as it is
believed that Lorenzo commissioned the work immediately
after Giuliano's assassination. Even more precisely, this
puts that painting to the second half of May 1478, making it
the most accurately dated Botticelli work
known.