The Rise of Austria: Victory of the Hapsburgs
"The Rise of Austria" is an althist with the Point of Divergence being that Joseph II of Austria does not marry Maria Josepha of Bavaria, instead marrying someone else, who gives birth to a son - Ludwig Karl Haspsburg - in 1780. Ludwig Karl defeats Napoleon in 1806, and reforms Austria greatly, which eventually results in it surviving as a strong power to the present day.
Here are some links to help you understand:
More to be added.