Perfect Fusion
The Perfect Fusion (Italian: Fusione perfetta) was the 1847 act of the Savoyard King Charles Albert of Sardinia which abolished the administrative differences between the mainland states (Savoy and Piedmont) and the island of Sardinia within the Kingdom of Sardinia, in a fashion similar to the Nueva Planta decrees between the Crown of Castile and the realms of the Crown of Aragon between 1707 and 1716 and the Acts of Union between Great Britain and Ireland in 1800. The once-Aragonese Kingdom of Sardinia had become a possession of the House of Savoy in 1720, and it had continued to be ruled as during the era of the Spanish Empire.