被科西嘉矮子吓尿了，自己主动退位 http://en.wikipedia.org/wiki/Dissolution_of_the_Holy_Roman_Empire
The dissolution of the Holy Roman Empire occurred de facto on 6 August 1806,
when the last Holy Roman Emperor, Francis II of the House of Habsburg-
Lorraine, abdicated his title and released all imperial states and officials
from their oaths and obligations to the empire.
