Many people may have thought that French Constitution was the first modern constitution in Europe but surprising to them it's their Eastern Europe neighbor Poland-Lithuanian Commonwealth who had theirs four months earlier than the French even if their revolution date back to 1789 but the first French Constitution came a little too late on September 1791.
Polish Parliament adopted their constitution on the 3rd of May 1791,making them the first in Europe and second in the world only to the ..........................

Click for full article - https://www.historicalville.com/2019/05/the-making-of-europes-first-modern.html?m=1

I Learned

Did you read about Magna Carta (The Great Charter of the liberties ) in the United Kingdom from 1215 to 1217?

panafrican:
Did you read about Magna Carta (The Great Charter of the liberties ) in the United Kingdom from 1215 to 1217?

That was probably the first relative to creating modern constitutions.