August 9, 1173 - Construction started on the campanile of the cathedral of Pisa (the Leaning Tower of Pisa). It would be over 200 years before it was completed.
August 9, 1854 - Henry David Thoreau published Walden.
August 9, 1902 - Edward VII is finally crowned King of England after the death of his mother, Queen Victoria. The coronation was delayed six weeks due to his emergency appendectomy.
August 9, 1945 - The second atomic bomb is dropped on Nagasaki.