It is known that Napoleon has given constitutions to a set of countries. The constitutions were written in the style of the French one.
How many of those napoleonic constitutions have played a role in serfdom abolition?
I know that serfdom has been cancelled at least in Duchy if Warsaw and Westphalia, but surely there are more to it. On the other hand, some places could have already gotten rid of serfdom in advance. And some could restore it right after Napoleon's fall.