The Federal Treaty (German: Bundesvertrag, French: Pacte fédéral, Italian: Patto federale) was the legal foundation for the new Swiss Confederacy of 1815. It came about after interventions by the great powers of the Sixth Coalition that defeated Napoleon.
The Federal Treaty defined a confederation between 22 independent Cantons. From 1815 until the Swiss Federal Constitution of 1848, it acted as the Restorationist Constitution of Switzerland.