Many Artists Use Symmetry in their Work

The 'Proportions of Man' is a famous work of art by
Leonardo da Vinci
that shows symmetry in the human form.

Can you think of examples of symmetry inside the body? 
e.g. the kidneys, the brain, the skull.

Look at the trees, the patterns in the brickwork, the table,
placement of characters and you will find symmetry.
Where else can you see examples in this painting?