Compare this to France, which went like this (not counting the smaller regimes):
* Absolute monarchy (ancien regime)
* Constitutional monarchy (until Louis XVII flees)
* First Republic
* First Empire (Napoleon seizes power)
* Constitutional monarchy
* Constitutional monarchy #2 (July Monarchy)
* Second Republic
* Second Empire (different Napoleon seizes power)
* Third Republic (only because the monarchists couldn't decide on which branch to restore, and agreed to a republic until one of the contenders died... who took an awfully long time to do so)
* Vichy France (after the Fall of France)
* Free French government-in-exile
* Fourth Republic
* Fifth Republic (the one we're on today)
Quite a stark contrast.