Original: Francis II ( ) ( 12 February 1768 2 March 1835 ) was the last Holy Roman Emperor , ruling from 1792 until 6 August 1806 , when he dissolved the Empire after the disastrous defeat of the Third Coalition by Napoleon at the Battle of Austerlitz .
Simplified: He was the last Holy Roman Emperor , ruling from 1792 until August 6 , 1806 , when the Empire was no longer a unit .